I agree that the fix is not to display the full email header for the "tech savvy" people. The real fix is some kind of reliable trust mechanism where the real Venmo account gets some visual indicator (pad lock, blue check mark, etc.)
Better to teach people not to trust email and to check the source of truth themselves. In this case they should check their bank account and verify they received a transfer (or their venmo/zelle account etc).
https://duo.com/decipher/chrome-and-firefox-removing-ev-cert...