Head Coaching Opening

I keep seeing people wanting a defensive minded coach for our open head coaching job but I have a question. Why just a defensive minded coach? Why are more people on this sub not hoping for interviews for Daboll or even Mike McDaniel to become the coach? Look at what McDaniel did to Deebo and what he’s doing now with Garoppolo at QB. Why should Houston not be all over him especially with a young Qb.