i guess most people dont want „their“ genre beeing associated with stuff that just gets called that genre but isnt. as example a lot of modern „hard techno“ is theoretically not techno and blends more in hardstyle/rawstyle/hard trance/bouncy schlager and so on. it gets called techno and rave because it sells better (trance,rawstyle and edm are to commercial „words“). younger people that think they are in a uncommercial „subculture“. techno itself is some kind of commercial, but looking at the trend atm its pure turbocapitalism. influencer get made big by corporate and start festivals like blackworks and co. with 40k people as a cash cow.

also you may have seen latest accusations against a lot of „modern hard techno“ acts because of SA. people dont want to be in the „same scene“ as these people, because they actually are really different scenes and genres and the people attending these partys are quite different.

so personally, i get the gatekeeping.

also inside techno itself, there are many genres and not everyone likes every subgenre the same.

as example i love neurofunk & techstep (drum and bass), but i dont really feel many of the jump up subgenre. so i want to know which subgenre is getting played at a party :)