I’ve thought the same thing many times. I love interrobang (not least of which for it’s kickass name), but the same sentiment can be expressed in other ways. Dialogue can convey the others, but if you want to recreate the way humans actually speak English, you need a mid sentence punctuation, like a comma, that can express questioning. Even in speech, we change our intonation to be higher when questioning, and we do that sometimes in the middle of a sentence. It’s just not conveyable perfectly with our current set of symbols.