alt Hacker NewsYou don't have to lock things down to solve that either - see the measured boot process with Librem Key for an example.
(that said, this is a completely different threat vector that I doubt the common masses actually care about; and if I really had to choose between openness and evil-maid resistance, I'd choose the former)
I think the common masses just expect it in the first place. If you told someone that leaving their phone unattended could lead them to getting their data stolen, they would probably be surprised. I know this isn't a surprise to the HN crowd, but it is for regular people.
I would also guess that the common masses would choose the opposite as shown by them choosing convenience over openness. It's convenient to not have a separate key to prevent evil-maid attacks.