Meh, idk tf he says he understands. Like "make [ported adobe CC] popos-exclusive": sure, big brain, how's that supposed to work, exactly? Or "there are 3 desktops ppl GAF about": riiiight, me along with other wm users aren't ppl anymore, apparently.
The whole video pretty much boils down to "I don't need X, hence nobody [«meaning the vast majority of ppl»] needs x". By the same logic, the "vast majority" doesn't need CC either, it's mostly necessary for professional designers, etc 🤷
I mean it's probably possible to choose the windows route and go "we make one steaming pile of garbage that kinda works everyone but perfectly - for nobody", yet linux distros so far have been pro-choice and pro-customization. You want "just works"? Sure, go with X, Y, and Z distros. Wanna something specifically tailored for your workflow? You may start with the same and replace/modify stuff, but also I, J, and K are a great base to build your future setup from the ground up and avoid banging your head against the wall while figuring out what drugs their devs were on. And the same goes for DEs/WMs: gnome is, gnome also works, yet if you want to change it significantly, you'll either have to mess with extensions or maintain a fork of a huge codebase you don't fully understand and most of which you don't exactly need. So, building from scratch may just be an easier solution.
Technically, you can also PR, yet it can easily be rejected, and then you're back to forks.