You are right. Lots of opinions and very little facts.
But I can't take anyone seriously if they actually think Otz would be a better hire than Hornacek. Hiring a sitting NBA coach (who was runner up for the NBA Coach of the Year last year) vs. an assistant college coach with no experience isn't even debatable. You could have the opinion that TJ would have more success in the long run than Hornacek but there is no way someone could say an Otz hire, on the surface, is better than a Hornacek hire and say it with a straight face.
Why not? Why is it a guarentee that a guy who is a successful NBA coach will be a successful college coach? How do we know Hornacek will enjoy recruiting? How do we know Hornacek will be good working with college age players? How do we know?
Can you name some successful college coaches who went from the NBA to college coach? I can think of Larry Brown, but he even got his start as a college assistant? Can you name a guy who went from the NBA coaching ranks to a head coaching position in college?
I think Hornacek would do a great job, but there really any evidence that says its a given.