Are the folks utilizing the H1B visa program working on the world's hardest problems? Or are they working on lucrative problems? Some kind of mix? Does anyone know what the breakdown is of H1B visa holders working on the world's hardest problems either today or historically?

I'm 62, I've been a mid-tier engineer all my life, working with tons of H1Bs starting in the '90s. My current employer is 90% Indian contractors now. None of us are working on "The world's hardest problems", we are building bog standard micro services.