If you know what "color grading" is (and your job depends on doing it) you're probably a "hardcore tech" person that knows what the mystical abbreviation "GPU" stands for.

"Professional" writers using a word processor might not understand what "hardware-accelerated H.264" means, yet there it is on their website under Air! Are those for "hardcore tech" people?

https://www.apple.com/shop/buy-mac

I think I've lost the point of the discussion.

You're referencing marketing material. All marketing material is to sell the product, usually to a somewhat targeted subset of the buyers. Looking at their sales, and around any office, their marketing, and "Pro" products, appear to be extremely appealing to a large range of professional users. I think this shows that their "Pro" label is appropriate. I'm having trouble understanding why you think it isn't appropriate.

Do you have a notebook in mind that is worthy of a "Pro" label, so I can see what you're baseline is?

You defined a "Pro" as someone that's "using your computer to make money", like writers using a word processor. Let's suppose all they do is use Google Docs in a browser.

Should they buy the Air, or pay the premium for the Pro? After all, they're "hardcore tech" people.

Sorry, I still don't understand what you think "Pro" should be used for, when the label is attached to a notebook.

Do you have an example of a notebook where a "Pro" label would be appropriate, as an example, so I can understand where you're coming from?