The problem you've got here is that the iOS model has worked incredibly well for Apple. Without that you wouldn't have had the investment that has delivered the M1.
I'd love to be able to run Firefox on the iPad. I also disagree strongly with some of Apple's decisions - especially on the App Store. However, where we are now is a better outcome than a hypothetical position where iOS is less successful and Apple is using inferior CPU designs. After all I can always buy an Android tablet if I want to run Firefox.