Surely, if you need this to read a book (again, besides any disabilities), you should stop your current habits.
Also, disability isn't binary? Some people have an easier time reading text than others — is your argument that books should remain less accessible to those people for whom it's harder because you don't personally feel like they should need it?
And then there are _lots_ of people that just enjoy reading this way. Audiobook production is its own art form, and many people like experiencing the text and the audio together. For some people it helps them focus in a noisy environment, for some people they find they can read faster with the narration, and some people just enjoy it.
Every single time I post about Storyteller, there are multiple people in the comments insisting that this shouldn't exist because no one should ever consume books differently from how they do. I don't understand it, honestly. If you don't want to read books this way, that's totally fine! You can even still use Storyteller — it works great with plain EPUBs. Why the need to make others feel bad for the way they engage with stories? The world is a better place if more people read more books — discouraging people from reading books in the way that feels pleasant and accessible to them makes the world worse.
I think if you feel compelled to instruct people you don't know to "stop their current habits" because you don't personally understand their needs or wants, perhaps you should reconsider your current habits, yourself.
Also, it's just fun to have the audio narration as you read. I typically set the speed to like 2.5x when doing readaloud.