I disagree, it most definitely should be when your version of Windows is no longer secure, and is more open to exploitation.
The solution for most would be to just repair or reinstall your OS.
Regardless, security reasons are pretty valid reason to block something.
That shouldn’t have happened to begin with, and is an abnormality that can’t and shouldn’t really be accounted for.
If one has a digital license, no product key has to be entered at all. You can just click through everything without actually having entered a product key.
If one has a product key, then that information should be kept, and not disposed of.