Eh. Whenever someone posts something like this, you get a bunch of folks, stating how they meet that description, etc. Sometimes, they do it humbly, sometimes, not.

In my case, I met that description on my first job, and I guarantee, I was not senior.

You see, my initial training was as an electronic technician (RF/microwave stuff).

That thought process described, was exactly what they trained us to do. Debugging a wonky RF board is about as ambiguous as you can get.

So maybe there's a different definition of "senior."