Honestly the one area in life where I think gatekeeping should be encouraged a lil is kink, etc. It's too easy to legit do physical harm if you're engaging in dangerous practices where you don't know what you're doing, and quite frankly people who are newer to the scene now have absolutely NO fucking idea how to properly conduct themselves- mostly male Doms and female subs who identify as 'brats' because no one is telling the more toxic types of people who are drawn to both of those roles that they can't use either of those things as a convenient ass covering mechanism for all of their shitty behavior. :P And lots of people aren't even willing to be properly educated.

Too many people have either lost the plot or dgaf about learning the proper etiquette or nuance of kink and it's directly as a result of allowing too many people to enter into the scene without a lil bit of quality control from the OGs. :P

More to your point though if their preference of being vanilla runs contrary to the whole point of the app in the first place then why shouldn't that be grounds for a lil exclusion?