No doubt, every kid that chooses pool does so because that's where the big bucks are and, when reaching pro level, is shocked that they aren't yet living on Park Avenue, in Beverly Hills, or at Hyde Park Corner. Yes, as you suspect, Shane's choice of pool must have been a miscalculation. Or maybe you just don't understand what achievement and success are about.
Money is not the only measure of achievement. Shane just lived a lifelong dream and he's on top of the world. Rather than being sad for him because he's being out-earned by some other athletes like Scheffler or Federer (who made over $90 million in 2021), why not be happy for him. The world is full of elite performers in all walks of life who have less money than we think they deserve. Many of them have had to settle for the respect and admiration of those around them.
Rather than bemoaning his lot in life, be glad for Shane, our new World Pool Champion and a living legend. Don't be sad, be jealous, for Shane has achieved something that awfully few who take pool seriously could dream of in their wildest fantasy.