@Finney Is Back is talking about before they've even been approached. No doubt if you want the job you prepare. But the idea that top coaches are immediately ready to jump with every little bit of detail on the off chance they might not get a call, is a little fanciful. It's a way of excusing how long this search has taken, given pre-season training is what? 2 weeks away?
Also there was an interesting bit in the Amazon doc, where Jose and Joao were talking about their surprise that Sissoko was seen as a respected member of the squad. I'm sure most top coaches already have some ready to go analysis accessible on most players in Europe's top leagues, so to an extent they can play off of that. But there's the more subtle team dynamics that can't really be figured out unless you're in the post and doing the work.