In the show, we see tons of battles, most of which use bending. Earthbender can pick up rocks that probably weighty several hundred pounds, but we see people take these with no problem and keep stacking. Firebenders generate intense fire, so how is no one burned even from the non-point blank range? This doesn't add up to me. It could be the infamous rule of cool or something to do with the physiology of the (supposed) humans in the show but I am looking to a different answer.