>>78888038It's not that they do other content in general, it's that they do cross-gender content in particular which is the antithesis of CGDCT. You can't claim to be both.
CGDCT often relies partly on having other Cute Girls around you to do cute things with, hence Cute Girls DCT plural. If you are instead surrounded by girls whoring around with males all the time in collabs, projects, cover songs or whatever, it starts limiting your ability to CGDCT. So yes it does erode it as a whole.