Whatever you achieve (or don’t) is significantly affected by everyone you associate with on a regular basis.
Just as it takes a village to raise a child, I’m convinced it takes a supportive community to raise your income.
If the people around you are going to frown upon your success, if there’s a chance they’ll reject you, it’s way too easy to throw in the towel. Why risk abandonment when you’ve got so much support for just staying put?
It’s a well known fact: “You become who you’re with.”