You only get to see what you get to see. I'm just suggesting that its entirely possible there are a fair number of people who run into problems with that, walk away from the game, and you never see at all. I've seen that with other games with problems just because I happen to encounter a few in other contexts.
Over and above deliberately abusive GMs--but to make it clear, the more mild cases of that are not rare--Ezekiel's not wrong that there are a fair number of people who respond much more negatively to sticks than carrots.
I'd suggest that most good ones are at least designing around the common mediocre GM to a fair degree, however. To not do so is to just shrug as a designer and figure that their bad experiences are their own fault, and I can't have much respect for that.