Where do you live that embedded systems folks cost more than a generic Python dev? Everywhere I've ever heard of, ES is on the low end of the pay scale for software. Python is usually in the middle somewhere. That's definitely true in Seattle as well.
+1 unless you work for google or maybe nvidia embedded get paid less than fronted devs straight outta bootcamp. at least that was the case last time i looked at those roles a few years back.
It's certainly attainable in ES, but you have to be fairly far out on the bell curve even with a decent amount of seniority in a HCOL area. It's nowhere near an average salary even in silicon valley.