You're way off base.
If a customer buys a phone, no investment or R&D is required by Apple to support other search engines, apps, browsers or payment systems.
It would actually require a massive investment by Apple to actually support all of those things as tested, enabled, documented, secured, stable, and fully supported (by the help-desk) features of their product.
You’re saying that because you bought a single iPhone that Apple now essentially reports to you. That YOU get to decide how Apple spends millions of dollars in its R&D, and that you get to decide how their software should function.
What makes you their master just because you freely chose to buy a single unit of a device from them? A device that, by the way, has sold billions of units.