Great reply Kappy. I marked that you solved my question. But, of course, I have more. Actually, I have mostly comments. Still, I'd like to have your comments on my comments.
You say, consistent with my understanding, "the "owner" of the computer is the initial user account created. That user is the Admin user. Only an admin user can create a Standard or Sharing account. That is why your account is setup as an admin account. Standard accounts do not have the full capabilities of an admin user such as updating/upgrading system software." And, you talk about security. So, here goes.
I've never worried much about a hacker getting in to my set-up so I never thought much about not having a standard user account. And, I'd rather get by with only one password for each of my computers. Maybe I should worry more, but, for me, a solid computer password, two-factor authentication, and a solid router password provide decent security (not perfect though). Yours is way better.
Anyway, why doesn't the installation process create a standard user account with a name matching the name that ends up on the home folder created. Wouldn't that be a natural thing to do given the concerns that many have about security, including Apple. The Admin account that is created would be the same (using the full name). And, the Admin password and the standard user password could be the same (or two passwords could be required during installation). In the first case, an installation caveat could be provided letting the owner know that it would be wise to change the standard user password.
In this regard, is the set-up Administrator expected to do what I mentioned before--create a standard user account with a name matching the name on the home folder set up. No instruction is ever given for the Administrator to do so. Does that work? If so, then the article I linked would apply if someone wanted to change the name of a standard user.
I think the installation outcome that is produced is odd. You end up with an Administrator and a standard use home folder (so to speak) with no matching standard user account. And, in my case, I end up using that home folder as an Administrator--which, of course, I have the right to do. So the user and the home folder have mismatched names (in a sense).