I don't agree that it is insane. It is less efficient than ideal, but 10gbit over copper is not necessarily dangerously hot or difficult to power.

I have a MikroTik CRS304-4XG-IN on my office desk with three out of four ports at 10gbit and it is perhaps 20 degrees above ambient on the outside. Warm but not hot. Passively cooled design.

A normal Windows laptop runs hotter than that when idle.