I understand the logic of this but it is somewhat based on the assumption - which most industries have in droves - that people in THAT industry are the competent bullwhark against stupidity.

I consulted for a company for a while where the 'sysadmin' was the owner's mother - who bought laptops from walmart. Not only could she NOT have approved updates like this, even if she could she would have she wouldn't have had any knowledge whatsoever with which to make a determination if it worked.

In an abstraction, the problem really is with externalities. These approaches to updates exist because people who CAN'T do what you describe are likely a more dominant part of the threat model than this happening to people you do describe. The resulting fix, as we're seeing, is very reliable until it isn't...and if the isn't is enormous in scale the systems aren't setup to fail gracefully.

If you want to make a rule...require graceful failure.