It does seem like a highly antagonistic way of working or perhaps I'm just naive.

If your only goal is to maintain a performance lead on your peers, you either need to gain and keep an advantage or find ways to actively make your coworkers disadvantaged (or both). And if you're already doing 1) then 2) isn't a far stretch.

> would you like to work on a team full of people like you?

If their team is already like this, what choice do they have? It's a prisoners dilemma where everyone else is defecting and I'm the sole cooperator.

IMO the onus for solving this is on the business owner, either through establishing a knowledge sharing culture or more comprehensive performance evaluation that rewards these innovations.