Do you have the authority to speak for all Apple customers? Aren't the people complaining also Apple customers?
I want this lock-in because THAT is what I want. THAT is what I bought and THAT is why I went Apple and not Android.
If someone asks me what phone to get I say iPhone most of the time because I know their needs and that they don't want to deal with headaches. If they need more stuff I'd recommend either G Pixel or Fairphone but they I tell them to do the research.