If the contractual details of malt distribution were going to affect the quality of beers you were getting then you absolutely would care. Unity's pay scheme will lead to studios shutting down if there isn't pushback. Studios switching to a different engine like Godot will make their games feel different for better or for worse and efforts to help fund these alternate engines will help tip the scale towards that being "for better".
But most importantly of all, this is a company using toxic and predatory practices. Regardless of the industry (yes, malt distributors too), if we don't push back against toxic business practices, then companies in many different industries will see avenues they can take advantage of to make extra money. These ideas don't hang in isolation. If Unity's scheme works, other businesses will learn from it. This is the reality of capitalism. Whatever methods can turn a profit without generating negative attention will be employed. It's in the hands of consumers, competing businesses, and the government to keep those toxic practices in check. I mean, why the fuck are we on Lemmy? Ultimately Reddit's actions are not going to affect the majority of users on their platform. Most of us came here to protest shitty business practices.
How a person reacts to being asked about the version of these things most close to them is telling. If they get defensive and deny the event happened, I would hesitate to trust their opinion on other things. Clearly that person bases their opinions on what they want to be true rather than reality. That's the kind of person whose ideology would likely lead to another event to be ashamed of. If, on the other hand, they admit it was a horrible thing and agree that people should be educated on it and that steps should be taken to prevent it from ever happening again, then I'm more likely to take their opinion seriously and believe that they can be part of the conversations we need to happen to create a better world.