You made the general comment that hypersonics don’t make sense “against airborn targets”, so that’s whst I was asking about…not bombers specifically. Fighters are airborn targets also, and those are what I was immediately thinking about when you said hypersonics make no sense against airborn targets.
If answering the email requires writing a book to anticipate all the possible questions or options or complications that might come up, then no it’s not disrespectful to call someone instead.