It's a variation of the travellers curse, where the more places you visit the less satisfied you will be with settling in any one place.
That happens because you find new, positive qualities in each place, and no place will ever have them all. In fact, over time any place will have proportionally fewer of the positive qualities you've found, and everywhere becomes less appealing the further you travel.
On the other hand there are measurable differences in places and people. You _could_ just stay where you were raised or you could move somewhere with better career prospects, less crime, etc.
Similarly, I've now been in a relationship with ~6 people, by my late 20s. I don't want to wait until I'm 37 to settle on a life-partner, but I'm sure glad I didn't try to settle in my early 20s.
Each relationship has taught me more about my self and my needs and also given me perspective on what kinds of people are out there and how they work with me. There are some flaws that I might have thought were just part of life and I'd just have to put up with, until I dated other women who didn't have those flaws. Sure no one is perfect, but some flaws are more compatible or more destructive to a relationship than others.
That happens because you find new, positive qualities in each place, and no place will ever have them all. In fact, over time any place will have proportionally fewer of the positive qualities you've found, and everywhere becomes less appealing the further you travel.