This is all fine. It really is. But what about Hischier? Nolan Patrick? Yakupov? There have been a shit load of examples of 1OAs failing and unfortunately, that trend seems to be accelerating recently.
I don’t know why we take it for granted that these guys are going to become good players because of where they were drafted. They have shown very little to warrant that since.
Hischier isn't a failure. He's been better than half a point per game since day one, and he was a co-headliner of a draft that, even at the time, was seen as mediocre at best (really, aside from 3-5, who in retrospect should have been 1-3, you only have a couple three guys in the whole first round who can be described as above average players--even today, Chytil probably goes top 10 in a re-draft). Patrick is from that same draft, also had those migraine issues, and was used by Philly the same way the Rangers use our trio of young forwards. Frankly, if they continue to get 3rd/4th line minutes and no PP, I wonder how long it will be before one of the three asks for a trade to a team that will actually play them (though that didn't work out so well for Patrick, as he's seeing less time with Vegas than he did with Philly, and that number will likely go even lower when Eichel's new neck finishes healing).
We take it for granted because the odds of two high draft picks both bombing out completely are fairly high. Given the minutes to develop, it WOULD be strange for neither of them to at least develop into a capable 2nd line scoring winger. Even 2017 only had two disappointing players (and one true bust) in the top 5. Looking at earlier years:
2017: 1 disappointing (Hischier), 1 bust (Patrick)
2016: 1 disappointing (Puljujarvi), 1 bust (Juolevi)
2015: 2 disappointing (Strome and Hanifin), no busts
2014: 1 disappointing (Bennett), 1 bust (Dal Colle)
2013: 1 sort of disappointing (Drouin), no busts
2012: This year was bad--2 disappointing (Murray and Galchenyuk), 2 busts (Yakupov and Griffin Reinhart)
2011: This year was good--the only "disappointing" player would be Ryan Strome (and then, only if you look at his early years). No busts.
2010: A lot of meh here, but no busts (this year, the top 5 were: Hall, Seguin, Gudbanson, RyJo, and Neiderreiter).
That's an 8 year sample, and there are a total of 5 true top-5 busts (only two of whom were top 2 picks). To draft a true bust in consecutive years with top 2 picks is astronomically against the odds.