I agree, however, if the user did want to enter their phone number and they did not notice a silly error because of how it was entered, then you've lost an oppo

I agree, however, if the user did want to enter their phone number and they did not notice a silly error because of how it was entered, then you've lost an opportunity. We are seeing this lib as users who get frustrated with marketing forms. There are other use-cases out there. I work with non-profits, where they may not have the budget for fancier validation, so this helps a lot.