Ok so the question is: What need the team? A #7 who is a top class pilferer or a #7 who can run all day?
I'm glad you made this post. As Tomikin noted, at the Brumbies, Hooper was an excellent pilferer. He topped the stats for Super Rugby in a season, and also topped the test stats for a season.
He has shown to be able to pilfer as well as, and better than all other international players, with the exception of David Pocock. When he has played that way he has in fact been world class.
David Pocock has never been a world class attacking player, and it's doubtful he ever will be.
To compare them and say Pocock is as good in attack as Hooper is at pilfering is hardly fair to Hooper. Pocock is nowhere near that level in his attack. He is not one of the best attacking 7s. He is actually one of the worst in fact.
I can see that Pocock could be the right decision, as the coaches may feel his superiority at the breakdown is more necessary than Hooper's attack that he brings. But we are talking about a player who is one of the weakest attacking loose forwards at international level here. To say attack is not what we want from a 7 ignores that some of the best 7s in the world (McCaw, previously Burger, O'Brian, Todd, etc.) are all good attacking players in the wider channels.
Pocock offers more in his strengths and they may in fact be best for the team. But to portray Hooper as some sort of hybrid player ignores the role the best 7s actually do play and the ability he has shown at the breakdown when he is instructed to play that way.