Never ever envy someone their success. You have no idea the price they paid (or will pay). There always is a price. Instead, use them to motivate yourself. And be ready to pay the price.
Or use them to motivate yourself *not* to pay the price when it isn't worth it. Either way, learn the texture of their success/price bundle, neither thinking you can have the pros without the cons, nor that all such bundles are equal.