[janoc]

That's BS. Verifiable credentials mean that you pick up a phone and call the references the candidate gave you.

What you are describing is essentially "it varies widely in rigor - so we must subject every candidate to a full CS exam, because we don't trust anyone."

Even in medical field the schools and standards vary, especially between countries. And there are good and bad doctors. Heck, some have even got their diplomas fraudulently.

However, that doesn't mean you will have the prospective hire sit in for an multiple hours/days of redoing university examinations during an interview - as it seems to be the rule in software engineering (and pretty much nowhere else). You would be laughed out if you tried that.

Especially for a senior position, where the candidate has a past experience you could ask about (i.e. not a freshly out of school student).