If you reintroduced the Coliseum, it’d be people desperate for money and the occasional guy with the actual agency to live out his dream fighting in it, and the aforementioned vast crowd of whiners with no self-awareness would be watching it on TV all the same, while ranting about how incompetent those gladiators are, and that they’d be much better, if only not for [insert convenient excuse here].
Indeed, the NFL exists, and you have described it to a tee. Given the amount and severity of injuries, I would say it’s a very close substitute.
Arguably you do in fact see this, at least as to 3-type species. Many bees, ants and other eusocial insects have queens, drones, and workers. Workers are often described as sterile females, but it seems like that’s us 2-typers imposing a 2-type frame on what are clearly 3 types.