Who put “UX designers” in the business of deciding what my habits should be?
From one of the pictures on your post:
> We guide every interaction.
This is as fascist as it gets.
I want my UX to be intuitive and easy to use, but what If I want to customize my UI for my own experience?
In the long term, yes - the customer decides, because it's the customer providing the money. Now, there's the whole "the customer is NOT always right, because the customer is often a clueless moron" problem, but ultimately, it's the customer's money to spend (or not spend).
There is nothing inappropriate about one vendor making choices. to continue the Apple example, they make 8 of the reasonably complete smartphones you could choose to buy. If you were forced to buy Apple's phone, that would be another matter, but you get to choose.