I think you are always in this phase of being able to be anything you want. Even as you are growing up, there are usually more choices than you can see. What experience and age gives you is a broader understanding that that really is the case and then, speaking from personal experience, you start feeling foolish for not realizing this before.

That said, changing things is never without some loss of contentment. Even if status quo is abysmal, we humans seem to prefer it over changing it. It is worth exploring, though, even if it is uncomfortable.