> We are overpaid for incredible working conditions and devs basically became capricious divas, despite the fact 90% of them are plumbers, and many not very good ones.

Maybe in the US, but in the UK a highly paid software developer can barely buy a 2 bedroom flat in a suburb where 30 years ago the salary of a junior factory worker was enough to buy a house.

> If you had any professional doing the same

Other professionals are less productive by orders of magnitude, just check what’s going on in the accountancy department of a random company. You can double their productivity introducing Excel’s pivot tables a V-lookup. Or try to get a plumber to fix your toilet within time and budget.