hey EVM devs, I had a question, I've seen many contracts having a internal function and then a public function, calling that function itself. what's wrong with making that internal fn an external/ public fn?

eg: transfer function just calls the _transfer function.
similarly many variables are private and there are view fn created for them, how would it be different from creating a public variable? https://i.imgur.com/jG3Ug9w.jpg

This solidity pattern is to firstly abstract the fundamental action i.e to make the necessary checks required for the "transfer"(internal) operation. Then the implementation of a new "transfer"(public) can be written according to the app by overriding it etc.