The problem is better is subjective, and not everyone will agree on, let alone know, what better really is.
And that is why non-aggression is so important. You can do what you want as long as you don't interfere with others.
Two points:
1) You completely ignored the first part of my post, which is in my opinion far more important.
2) What if I want to interfere with others? What if I want to do it violently and aggressively, and rob all their stuff? What if I find a crew of like-minded individuals, and together we try to rob their stuff with force and overrun their paid protection? They could call us the "Tax Men," but I guarantee you our rates are far higher than the governments. Have all the faith in humanity you want, but this is a possibility that must be accounted for.