Humphrey has serious bust potential at cornerback. Did you see Sammy's clips of him getting roasted? The league could of saw Humphrey as second rounder. You are talking as if Humphrey is a clean prospect that is nearly bustproof. When a dozen players drafted between 17-40 outplay him all the excuses aren't going fly. Oz and Eric can not tell Biscotti well we saw them players as lesser than Humphrey for various reasons. Because it means he was wrong. And there will be no excuses if Humphrey doesn't play to his draft status. By that logic the league saw Tim Williams as a mid round talent. And not completely because of his character flaws.
He is a pretty safe player - yes he may have troubles with his back to the play down the field but that's what deep safeties are for - within 10-15 yards of the LoS especially in zone he is going to be a big improvement on the field straight away and that is his floor - so he comes in and helps fix one of this team's weakest parts of its defence which is its ability to stop short passes/screens/quick outs in zone coverage
and you are just assuming he will fail what about when he outplays guys drafted ahead of him because that is just as likely as the scenario you have envisioned - and they definitely can tell biscotti as lesser players because steve was in the room with them with the draft board on the wall
and 100% the only reason tim williams fell was because of his character concerns - i had him as the 12th guy on my board on a pure talent level and many league sources have been said to have seen him as a top 15 guy pretty much across the board on pure talent level
no prospect is completely bust proof or they would be taken number 1 overall - but humphrey has a pretty high floor as at least a role player and a guy who will get on the field but his ceiling is a lockdown corner of jimmy smith-esque ability which is why we got him at 16
i guarantee you his range was not 17-40 as he was widely expected to be the 2nd corner off the board by team sources after the sidney jones injury which suggests that even if adoree jackson still went ahead of him, oakland almost certainly would have taken him at 24 - so his range was probably more like 11-24 than 17-40 (which is a number you've pulled from nowhere - i trust the league far more than i trust sami)