I could do all this in my sleep when I was in my second year of career, and now I'm in my 24th year (god, I'm old).

What you described isn't just easy, it's trivial, and extremely boilerplate-y. That's why these automated token prediction machines are reasonably good at it.

You created something from scratch that used several boilerplate components with general use cases.

The amount of times professional devs do this is probably almost nil on the scale of the world.