They work very hard to make sure all their product lines form a cohesive experience. It’s very different than GE simply (once? Still? Someone fact check me) owning NBC. Or Blackrock just owning a ton of real estate. The latter just owns shit to own shit.
Each of those can be reasonably separated. But I do think that it is quite natural and will stop the digital dictator mindset, most importantly splitting of digital services from marketplace and both of those from hardware.
Notably they seem to view their product lines quite different, the website lists "Store Mac iPad iPhone Watch Vision AirPods TV & Home Entertainment Accessories".
You're essentially just asking them to destroy the company and each of those products. I'm really not sure how you're going to go about this when all of these operate within the walled garden. I mean it 100% won't happen, but further I don't see how this would benefit the consumer in any way.
How would it destroy any of them? They could all still be used together by anyone who prefers that. Anyone who wanted to could continue to install apps only from a specific App Store even if others were available. You could still run iOS on an iPhone even if iOS also ran on Samsung devices and Android also ran on iPhones.
The only change is that you could also choose something different.