Author almost realizes that they're asking for something that is at best a mirage and then bats away that thought[0]. But that's not something that you can casually dismiss near the end of your post, it's a crucial flaw in the whole idea! The comfort that you get from seeing "John Smith" as the contributor instead of "rand_user_43" is indeed an illusion; not only do you have no way of knowing that "John Smith" is their real name, even if you did demand to see their government ID, and even if that was forgery-proof and definitely identified them, they can still commit malicious code; the best hope is that you can impose after-the-fact consequences, but that's... really optimistic, especially as a deterrent.
[0] An alternative steel-man is that the author does grasp that they're pining after something that doesn't actually work but still argue for it, but that feels even less charitable so I'm going with the other interpretation.