> Why not permit people to allow themselves be killed in entertaining ways, for a pay per view audience, with their surviving family getting 80% of the proceeds?

We already allow shades of that, and society hasn't collapsed.

Ie we seldom allow people to consent to outright death, but we certainly allow them to take on a great deal of risk of injury or death in return for fame or money. If you repeat a 1% chance often enough, you are going to hit the jackpot sooner or later.

So I'm not sure your reductio ad absurdum works here.