Aside from stalling and idling behaving erratically, are there legitimate dangers to a supposedly malfunctioning throttle body that needs replacement?

I just ask because casas always go for replacement, and I am wondering what the dangers are in not following what they want to happen.

I did some reading on here and read about an Optra that was advised to replace throttle body but the owner did not. It seems it was incorrectly diagnosed and he got a good running car without replacing the throttle body.

My car is a civic 07 AT. TIA.