Well, the real heart of the matter is not that one's standards may be too high (or rather, too cruel), it's that they have (openly acknowledged) standards at all. The presented idea goes elitism (having standards) can make people feel excluded or inferior, so abolish elitism (having standards). Whether you are judging random individuals or individuals put in positions where there is higher expectations, it doesn't really matter. In this light, all knowledge and experience is equal, so there is no playing the game right or wrong, no good or bad reviews (opinions), no being experienced or inexperienced; everything is just different - but equal. Like I mentioned, such ideas would be disastrous in things that "matter", so they only exist as outcast niches, like hippies trying to comment on physics, but obviously there's no immediate harm in treating everyone's thoughts equally when it comes videogames (or art in general), so it's more acceptable.
But what proponents of this idealism overlook is that in acquiring more knowledge and experience than others, you begin to understand others as well. The man on the ground only sees what it is in front of him, but the man flying above him not only sees farther, he also sees the man below him and what he sees. So if you are know that someone hates a game and you can see their lack of knowledge compared to yours, then you inevitably make a judgment on their ability (basically, the person themselves) to explain this difference and set a standard (which is mean and cruel, etc).