If Valverde , who managed one of the top six clubs in the world to two titles, comes as 'interim' manager, its because he expects to prove himself to take the job permanently at the end of the season. Absolutely no point in him taking the role otherwise.
That's good for him, it doesn't mean we have to appoint him.
The issue with Ole getting the job permanently based on his spell as interim was
1. He had no credentials prior to United
2. He didn't even do a good job as interim, we appointed him before we saw how the full season played out. It was an absolute disaster.
3. The players most likely didn't even want Ole to stay on as manager as they'd stopped playing for him before the end of that season.
If Valverde was to get himself in a position where he got the job permanently, it should be on the basis that he does something exceptional in his interim spell,
and the players want to keep him on. Otherwise you thank him for the job and get a new manager in the summer. Granted I don't trust our board to make logical decisions.