The flip side is that when you don't have parents to fall back the risk level of all your actions become higher, and that will limit you in other ways.

For example, I emigrated in another country. Knowing that if I failed, I could go back home for a few months was a key factor ( as was the possibility to be there for a few months before, to manage the transition ). Maybe the extra-motivation of having my back against the wall would have pushed me in another successful adventure, but I would not have risked my career the way I did.

So well, that's really not black and white. And depends a lot on the type of parent you have.