You keep repeating this "ovens don't go to 500F" claim all over the thread and it is just wrong. Looking at lowes.com, around half their oven inventory has a self cleaning option, requiring the oven to be able to get to that high temperature. Even a cheap electric oven will often have a self cleaning feature and a max temp above 500F.

What evidence do you have for this claim?

Turning my burner up to max my carbon steel wok has gotten up to 700. Before I knew better, I had an old non-stick wok and on the first use the coating came off at high temperatures. Never actually cooked in it, threw it out and went for the carbon steel instead.

Many ovens have their top temp at 550F. And when the broiler is on, it can go well above that (although in a smaller more focused area).

Think you mean smoking. Plenty of oils have flash points above 500F and a few have smoke points over 500