I love Pete Egoscue's stuff. I read his books long time ago, tried many exercises in my training and eventually adopted some of it into my style. The majority of my clients get great relief with some of the simple exercises, too.
PostureGuy is correct that a lot of the "born with" stuff is just something that was very mild sometimes long time ago and that with time and incorrect movement grew into something huge. It's never too late to start correcting things. It can take longer if the person has had the problem for long time, but any improvement is better than nothing. Patience and discipline to do the work is the key. Sometimes people give up way too early.
We are what we repeatedly do... Excellence then is not an act, but a habit.