Quote Originally Posted by Abdula
You should check again because I can give you numerous examples of people sent flying through rocks and trees and even walls without much consequence. The rules of what can and can't be done in Naruto were never fully established and even those that were are subject to change at will.
Can you list them? I can't actually think of a time when any characters were physically sent through rocks and trees without much consequence.

Well, the only exceptions (if you can even call them that) that I can think of, are chouji's pill-powered meat tank through the rock wall and Kimimaro's bone spear through Gaara's hardened sand.