Putting myself in Apple's shoes: I just don't see the financial incentive to invest a whole lot in the native GUI story for the Mac in 2022 Regular people mostly use iOS. Many don't have traditional computers at all. That was originally the Mac's core market. It still has a strong professional market- but many of the serious professional tools (Adobe, Blender, IDEA, etc) use their own custom in-house GUI frameworks,…
It's small compared to iOS, sure, but I think it's still an important part of Apple's overall portfolio. It's currently what all of the iOS developers need to use. Its what Apple's own people use for their work.
I guess the difference of opinion may turn on the phrase "invest a whole lot". I have no idea what kind of investment Apple is making in Mac native GUI frameworks. It's obviously non-zero and is likely what most would deem non-trivial, but I'd argue that it's worth a decent size investment because it is still a potential differentiator for a $40B part of their business.
I will also note that there are some excellent professional native Mac apps, even beyond Apple's own. Things like Pixelmator and the Affinity suite, for example. I'm definitely running a combination of native Mac and Electron apps right now, but I still appreciate the native apps when they're available for the job at hand.