Hardware engineers in MAANG makes about 20% less as well (anecdotally). Our wage is not that far off in tech (one signs as I mentioned). But we definitely have way less job openings compared to our SWE peers.
The claim was you'd make 1/5th. Which may have been a wording mistake. I'd believe maybe 20% less in general--which may very well be fine for many people if that's their preference.