The big issue here being that Adobe has zero interest in selling this, and this kind of model would not lead to a $250B market cap business. Adobe wants to tightly control the experience, record how you use the software, display their own branding, try to upsell you on their other products and services, etc etc.
Software businesses care about controlling the UX/branding/etc. tightly, because that's where the money is - not selling "menus of filters". That's why every webpage is nowadays is a SPA that hijacks standard browser features like scroll and copy paste and no one looking to make money was ever interested in the semantic web.
I'm very aligned with the views exposed in the article and your comment, and have been working on some open source approaches to it in my free time for a few years now. I figure that the only way that it can maybe work is to make something for myself that I love using, and maybe some other enthusiasts will like it too and it can grow a bit from there. But there's probably no way it would ever meaningfully compete with Photoshop, because it goes against every economic incentive that software companies have.
In parallel, I also suspect that that's why the design/UX of open source applications tend to be extremely poor in general - great, tight design is expensive and needs strong economic incentives.