your lumping everything together. a yeshiva thats not the same type as bmg is grounds for inquiring about for shidduchim if your looking for a standard bmg type boy. however, its a misunderstanding that there are no other standard bmg type/caliber yeshivos.
also, i wanna see if you would say “who cares if wut he does is not so common” if you were looking for a your daughter. Not saying to nix the shidduch necessarily, but out of the ordinary is a red flag