You can also never say that a manager from a side that is doing well will have that same success if they were here either, it's all about timing and what you have at your disposal. It's pointless to suggest that had we got Moyes in we'd have been flying now, he would be coming in to a club that demands success, thus increased pressure and a few wrong results we'd all be saying Moysie is still an also-ran. He didn't win anything in 11 years when we had a decent side and the opposition were less numerous and less equipped than they are now.
On top of that most managers that are actually deemed successful have won most of their trophies before 60, or at least started before and carried on. Moyes is into his 59th year. It just doesn't stack up. I would not begrudge him getting his moment in the sun by winning a pot as he is a competent manager, just one that up until now has not been able to give his team that inner belief that they can do it.