iOS has been steadily offering more options over time. And yes taken individually customization seems like the correct choice basically every time but eventually you end up with a mess.

Consider the logic for tap’s could offer hundreds of customizations. That’s core functionality and I’m sure someone internally is thinking deeply about many of them. But if you offer zero customization most people just get used to how things operate so skipping that functionality isn’t terrible for the average user. Instead they offer options for people with disabilities which is a distinct group who can’t just adapt and thus a meaningful justification.