Ignoring the lack of updates if the game is buggy, games back then were also more focused on quality and make gamers replay the game with unlockable features based on skills, not money. I can't count the number of times I played Metal Gear Solid games over and over to unlock new features playing the hardest difficulty and with handicap features, and also to find Easter eggs. Speaking of Easter eggs, you'd lose a number of hours exploring every nook and cranny finding them!
Yeah I always get pushed back on that, but honestly, I'll "die on that hill". Also, speaking of games not just in the 2000s, but even earlier.
Back then corporations had to sell cartridges and ship them, and if they shipped with any bugs, that was the death of the game.
At the end of the day, usually when I'm debating this topic with someone, they can only point to a few examples of bugs in cartridge games or in PC games back then, which was a very small ratio to all the ones that shipped correctly.
My point is basically the ratio of good games to buggy games was a lot better back in the day than it is today, because developers are time-pressed and semi-lazy, and they just figured they could fix bugs in post-production.
And funny enough, the pushback I usually get seems to be from astroturfers trying to hide that fact, of not doing as much due diligence before shipping, because it could just be fixed after the fact, regardless if the customer gets a worse product at first or not (not saying that of you, just generally).