A lot of the time I think they are overlooking the bugs and focusing on the game as a whole. Kind of with the mentality that once you get past the buggy husk you get the tasty kernels inside.

Fallout 3 (through Steam) was unplayable without mods for a while because Games For Windows Live was used as DRM and was shutdown years ago but if you checked the Steam reviews a significant amount of people omitted this or were fine with the game (mostly) working once you got over that hurdle.

Personally I didn't think this was unacceptable considering the GOG version worked fine but it goes to show the mentality people have.