General Discussion

That's not quite correct. If we look at 1 Corinthians 6:9 (not nice) and the commentaries around the words to explain it, we can find things like the below. Summary: not just being gay but even being effeminate. Additionally, I've never heard a single sermon where they were saying the Greek doesn't actually mean that. They all very much meant it.

Reading exercise if anyone likes walls of text.

English amplified:

9Do you not know that the unrighteous will not inherit or have any share in the kingdom of God? Do not be deceived; neither the sexually immoral, nor idolaters, nor adulterers, nor (perversely) effeminate, nor homosexuals, 10nor thieves, nor the greedy, nor drunkards, nor revilers [whose words are used as weapons to abuse, insult, humiliate, intimidate, or slander], nor swindlers will inherit or have any share in the kingdom of God.

Here's one commentary: https://gospelreformation.net/pauls-understanding-of-sexuality/

Paul’s Meaning in 1 Corinthians 6:9 First, the two words malakoi and arsenokoitai describe individuals who are engaged in activity that Paul regards to be sin. We see this point in at least two ways. First, these two words fall in a much longer list in 1 Cor 6:9-10. Paul insists that persons whose lives are characterized by these actions “will [not] inherit the kingdom of God” (1 Cor 6:10). There is considerable overlap between this list and the list of 1 Cor 5:11, which describes individuals who are subject to the discipline of the church. Second, the word arsenokoitai appears in one other place in the New Testament, 1 Tim 1:10. In the context of Paul’s argument of 1 Tim 1:10, this word describes a violation of the moral law of God (“the law is not laid down for the just but for the lawless and disobedient, for … men who practice homosexuality,” 1 Tim 1:9,10 [ESV]). These two words, then, describe activities that are violations of the law of God, that exclude one from the Kingdom, and that are subject to the church’s discipline. Paul understands these two words to describe sin.

Second, Paul understands these two words to describe a particular kind of sexualsin. These two words follow three words, two of which denote immoral sexual offenders (“the sexually immoral … adulterers” [ESV]). The word arsenokoitai follows “the sexual immoral” in Paul’s catalog of sins against the Decalogue in 1 Tim 1:10. The context in which the terms malakoi and arsenokoitai appear together, then, shows that these terms refer to a specific type of sin against the seventh commandment.

Third, these two terms together capture the range of male same-sex activity. Some have argued that Paul is only condemning a particular or narrow kind of homosexual behavior, such as prostitution, pederasty, or rape. On this reading, there is space in Paul’s ethic for non-exploitative homosexual activity between two consenting adults. This view runs aground on Paul’s argument in Rom 1:18-31 and it finds no support from 1 Cor 6:9. For one thing, in Paul’s day, the term malakos had already acquired a technical meaning when it was used in sexual contexts.[2] It denoted the passive partner in male same-sex activity.[3] The term arsenokoitai makes the point particularly clearly. As commentaries frequently note, Paul is the first Greek writer who appears to have used this term. It is a compound formed from two nouns meaning “man” and “bed.” Its origins are not difficult to discover. These two terms appear together in LXX Lev 18:22 and 20:13.[4] In fact, in Lev 20:13 the two component parts of Paul’s new word stand side by side. Both these passages in Leviticus roundly and categorically condemn same-sex activity. This background is important to understand what Paul means by the term arsenokoitai. This word must refer to a wide range of male same-sex activity and may properly be translated “bedders of males, those [men] who take [other] males to bed,” “men who sleep or lie with males.”[5] Since it is paired with the word malakoi, the word arsenokoitai may particularly denote the active partner in male same-sex activity. The two terms, malakoi and arsenokoitai, then, capture, in unqualified and comprehensive fashion, male same-sex activity.

Fourth, Paul is concerned to address sinful sexual behavior in these two terms, but not only such behavior. In Paul’s day, the term malakoi could denote more than just sexual activity. Such persons sometimes “intentionally engage[d] in a process of feminization to erase further their masculine appearance and manner.”[6] That is to say, the word malakos was used to describe “a man who is trying to be a woman,” a man “who significantly blur[s] gender distinctions.”[7] To be sure, Paul’s primary concern in 1 Cor 6:9 is with same-sex behavior. But the apostle is also aware that, in the social context of which he and his readers were part, those who committed themselves to this lifestyle not infrequently blurred the culturally discernible lines between a man and a woman.[8] It is in this sense that one can appreciate the translation “effeminate” for malakoi, even if one opts for another English word that better captures the sense of the Greek word in the context of Paul’s argument.

I think we get the point though. There's more.

Why would you trust the Greek translation on that topic? They had a clear bias on the subject that would've influenced word choice.

It sounds confusing. How can we be sure which rules are rules and which aren't?