Many people see the world as inherently adversarial. There is no cooperative solution to any society-scale problem for them. They just see a bunch of people and

Many people see the world as inherently adversarial. There is no cooperative solution to any society-scale problem for them. They just see a bunch of people and isolated groups with dollar amount score cards, clawing their way to the highest position they can muster. So, they have no problem helping one adversary against another, and do not see it as immoral to get ahead at others' expense. (That's what winners do!) The only problem in a trolly problem, then, is if you're not the one operating the switch.