Hang on.... wasn't Composer supposed to mean we had one-click installation?

So how come when I copy the link out of the Drupal module page e.g.

composer require 'drupal/blog:^3.1'

I get the error message

"Root composer.json requires drupal/blog, it could not be found in any version, there may be a typo in the package name."

And the proposed solutions are that I have to write and run code?

Blog is not the only package I'm having this problem with. Yesterday, I solved it by installing a previous version (2.x instead of the current 3.x) for a different package. And it's on both D10 and D11 with the latest version of Composer (which D11 reports isn't the right one) and approved PHP.

This is silly.