I gave you that reason. You can criticize someone's job without having to imagine their role and I didn't suggest that Secco was a dufus in fact your paragraph about him tells you why he got a fair chance and wasn't quickly fired.
Basically based on your own assesment the person actually in charge of team construction including transfers and Football staff hiring wasn't a dufus and did a decent job in spite of a very difficult context. Blanc who was not a Football man but an administrator with a large experience in other sports namely Tennis, cyclism and motorsports did his job to a fairly high level.
And I will reiterate I don't have a clue about how well he would do at United, my issue is with the way you framed things. You know that he wasn't in charge of the areas you mentioned, you know who was in charge but somehow judge Blanc on those aspects, it makes no sense for at least two reasons, first because it wasn't his role and secondly because unless the man totally changed this year, it wouldn't be his role at United either.