The point you missed while making your winded argument, was simply that NHL teams all have a guy who is right at the cusp of making it to the NHL or is in the NHL that is above or beyond what Kulak would offer Vegas.
If you just go down the first few teams:
Anaheim; may have to leave Manson or Vatanen exposed
Arizona; Tinordi will not be protected, past 1st rounder with size.
Boston; Joe Morrow might not be protected, past first rounder and known commodity.
Buffalo; Will be able to negotiate with Kulikov beforehand, the guy's been a high level defender in the league once before and only a few years older than Kulak.
Carolina; Trevor Carrick is like a Canes' Kulak.
Chicago; literally whichever of their young D they want, because Chicago can't protect a single one. Pokka, TVR, Svedberg; whoever.
etc, etc, etc.
My point is not 'I wanted someone to spend 30 minutes compiling advanced numbers to compare our player against the league', it's that Kulak's 3 points in 21 games is going to keep McPhee & co in their pants, plain and simple. There are a lot sexier names out there for Dmen; and in reality Kulak likely wouldn't crack the top 7 for exposed Dmen names; and if he can't crack that list, he's waiver fodder and it's a waste of a pick for Vegas.