"May your hobby become mainstream" is a subtly evil curse that's analogous to the classic "may you live in interesting times"..
The current era is proof-positive that Gatekeeping absolutely can be a good thing, and should be exercised in order to, well, exorcise the more recent polluting subversives out..
Traditional elements of a hobby (etc.) can, and should, be maintained– and without apology. Sure, "the only constant in the universe, is change." But unlimited growth & change just for the sake of unlimited growth & change is, by definition, CANCER... and cancer left unchecked always results in the eventual death of the host organism. But any & all aggressive cancer treatments are also extremely unpleasant (to put it mildly), but necessary. The analogous "chemotherapy" that is necessary will also invariably "kill off" some positive elements as well during the course of "treatment," but the consequences of allowing this "cancer" to freely metastasize further will eventually be far worse..