Not at all, not at all. Your point of view may change once you're on your own responsible for paying your own rent, bills, car note, insurance, etc etc. I left home on my 18th birthday because I figured I was 'too old' to have to adhere to such rules- but I left and moved into my own place in order to do so. In retrospect, I guess I'm lucky I didn't get into more trouble as a young man considering...but had I stayed home, chances are I wouldn't have gotten into any trouble and life could've been a bit different.
I have no regrets- and having raised two children of my own I can tell you- my house, my rules. If my 21 year old daughter wanted to come live w/me, she understands that the rules come with it. Same with my soon-to-be 18 year old...she lives w/her mother and is subject to her ruleset but if she lived w/me, it'd be mine. As a parent, it is our responsibility to think about, and in some cases, worry about some of the decisions and actions our kids will face and be a part of- which is why there are rules in the first place. You let a kid have free reign and you'll have trouble on your hands. I know grown people, in their 30s who still live w/their parents...perhaps at that age, the rules might need to be altered, but I wonder at the sanity of parents who would let their kids still live at home at that advanced age. Could not, would not be me!