1) developers do a lot of work to make their apps great and if they were allowed to make alternative payment options alongside apple’s it would require that they handle payments without apple. In that case apple is only the distributor on their own devices—a role they are unwilling to share (as is fair, in my mind). But apple’s right to other people’s software ends at distribution.And what prevents those developers from stopping support of using apple payment system once they have their own? Why should Apple provide all the backbone, the equipment, the software features that the programs use to enhance their function (Augmented reality etc.) just so some App developer that had none of the investment in that Apple does can get rich without paying their dues? Why should digital enterprises not have the same burden that physical stores do? If you create a physical product and you want to have it sold in target or walmart you have to pay whatever walmart wants to charge for that. How is that perfectly acceptable but Apple doing the same thing is not?
Again what is fair to one side in your example is completely unfair to the other. Where as currently 80-90% of the app developers are only in business because Apple created a platform for them. Look at phones prior to Apple, with snake being the most exciting game you could find and there was almost non existent phone app market.
The decision to allow this wont only have a negative affect on Apple and other Smart phones in the future, but an incredibly destructive impact on innovation as a whole. Why invest millions of dollars creating a whole new platform and industry only to have small special interest groups and people willing to lobby the government to come and take that away from you? If you think companies like Apple or even Google will continue to invest heavily in systems where there is a good chance that someone is going to push the government into wresting control from them, you are kidding yourself. So if you want to see new and exciting platforms and products in the future you better hope this kind of bill gets squashed quickly.
2) Having alternate in app purchase options is not at all like a store not getting commission. The developer made the app and once you leave the app store and enter that app you are no longer in apple’s store—you’re in the developer’s.
3) like you said, competition on apple’s platforms is not good for apple. But it is very good for developers and users, or in other words, its bad for one company and good for the people