Aldarc
Legend
I don't want to discount what you say here, but I do think that there is another legitimate reason why people want "official D&D stuff," namely that it creates a common shared experience or language for the game community as a whole. So there may be 10 versions of psionics, for example, on DMsGuild, but people may want a version that is shared across tables. So when they sit at a given table, they have a pretty good idea or set of expectations about what they are playing. And when they talk about psionics in 5e, it becomes easier to talk about playing those options rather than traversing which version of psionics from DMsGuild they need help with. I don't think that what WotC produces is necessarily more balanced or authoritative, but what they produce does provide a communal experience and language. It is hardly a coincidence that this forum scarcely discusses DMs Guild materials as compared to discussion for WotC-produced materials.Everyone only wants the "Official D&D" stuff because there's supposedly a level of balance and playtesting and authority that comes with it. Using older stuff or 3PP stuff is a "minefield" where you just don't know how good the stuff if.