> That doesn't make them a hobbyist. It makes them bad at their job.

Correct. The point is that a hobbyist doesn't have to care about it. When I write software for personal use (read: as a hobbyist), I don't worry about having good accessibility labels, or testing for localization support. When it's a hobby, I write the software I want to use.

When I write software professionally, I need to make sure it is accessible. Otherwise I have failed.