>He isn't using the functionality that Photoshop provides
And since that is the same for the vast majority of photoshop users, he provided a super helpful guide for them. It does not say "how everyone can switch to gimp".
You have a long road to hoe before you claim so emphatically that that's true for the "vast majority" of Photoshop users. Photoshop is the 90/10 app to end all 90/10 apps.
I do very straightforward digital art and manipulation and I'd put my head in an oven before trying to do it in GIMP, and I am not using anything complex.
I didn't say you would want to switch. I said most people use little photoshop functionality. If you think that is controversial, then I think you are delusional.
And since that is the same for the vast majority of photoshop users, he provided a super helpful guide for them. It does not say "how everyone can switch to gimp".