I am letting you. It is just when the number is sent to the backend it is converted into a usable format where I can for example generate tel: links and otherwise use the number. I agree that there is some value to being able to each your number back how you typed it, but I'm not sure it is more valuable then showing you the number how I am actually going to try to call it.
Sorry, sounds like a misunderstanding. I always meant to accept anything, that is why I put a replace in my top comment not saying that I would reject the form.