Lowering their cut is antithetical Apple. Apple should remain at 20% and perhaps go as high as google adsense. You agree it is a premium experience that comes at a cost.
The above has nothing to do with Apple's cut on other people's work. That is just exploitation and is unrelated to increasing the quality of the experience for users. On the contrary, it makes life harder for developers wanting to bet on quality and instead encourages shovleware and deception. And this is exactly the outcome one sees.
The app store experience is what is antithetical to Apple. There is nothing premium about it.