Apple obviously profits off of Apple pay which is why lots of banks either don't participate or took their sweet time doing so, and many stores outright don't accept Apple pay at all.
The issue is that there are open standards for NFC and the only thing preventing people from using the hardware is Apple itself. On an Android device, this is not the case. Apple might as well dictate what images are allowed on their displays, or what wireless routers you can use to connect your phone too (like only Apple ones, if they still made them).
On Android, you can have Samsung pay alongside Google Pay along side a banks app allowing NFC payments or even enable work badges on a phone. Where payment platforms are proprietary is in their won apps with how they encode and decode account numbers, store, transmit, and charge fees.
If NFC wasn't already governed with open communications standards, and Apple actually invented the hardware it would be a totally different story here. Apple is saying on their App is allowed to use the NFC chip in the iPhone the way they like it.