In a way, your enjoyment of the RPG hobby is contingent on finding other people who enjoy the same things that you do, or at least, persuading or convincing others that they should enjoy the same things you do.
That's why some people who hate Book A, Rule B, Prestige Class C, Feat D, Spell E, Exotic Weapon F, System G, Edition H, Play Style I, etc. put so much effort into deriding them and trying to make others believe that they are bad, too. They are fuelled by fear that others will otherwise be converted into liking what they don't, and they will end up with less and less people who like the same things they do. If that happens, they will be forced to play with things they don't like, or go without a game completely.