Maybe my experience is rare. Cause it has never caused an issue. Out of my 12" Condy, my 15" Carpet, my old 9" Riteri, my old 10" carpet, and my old 5" RBTA... The RBTA Killed my small clown. And the carpets are the only ones my clowns will host.
My Condy even at that size has never grabbed a fish, stung my other corals, or anything else. They will host Sexy Shrimp too.
I think a lot of their dislike is due to bad advice from LFS.