TBF that's usually more of a mind-set restriction where there really isn't anything actually stopping them from doing that other than it just not being in-character for them to do so. There's no reason Twilight Sparkle couldn't just rip somebody's heart out of their chest with TK other than the fact it's OOC for her, a hypothetical bloodlusted Twilight would therefore be fucking terrifying.Is Shad on drugs or what?
Avatar actually does spell things out for the viewers.
Reminds me of a "why don't people with TK crush enemies' brains from inside instead of throwing stuff?" discussion I've been part of.
Whereas Bending has specific restrictions on how it works that generally keep anyone from doing the more broken stuff.