[throwvirtever]

> But no one forces them to be in that industry, other than their desire to earn high wages.

High wages are definitely a factor but being competitive and feeling energized by trades paying off count as well. It's a combination of high reward, betting excitement, and the pleasure of crushing your competition in a context where score is easily kept (in dollars).

If those are the things you enjoy, it's difficult to find all that in other industries.