my son Rion has trained with many different brown and black belt bjj instructors
they dont even know 10th planet moves, they dont even know how to coach him when he is using 10th planet moves
that is why they bad mouth it and coach against it, because it is stuff they dont even know themselves
if there bjj instructor taught them rubber guard, twister etc as they were coming up in the ranks then it wouldnt be a issue, but because there instructor didnt know the moves and they were never taught the moves then it must not work
i say learn from everyone, everything you can, use what you like and throw away what you dont like
"make it your own" thats jiu jitsu