Not that I want to defend Clarke, but it's not inconceivable that the Flyers had Makar #2.
It's funny since that was one of the years when the lottery was later than usual. In 2016, every Canadian team missed the playoffs so Sportsnet pushed the lottery back until the end of April to entice their audience to watch a second round series they might not care about.
But as a result, the U18s were completed and most junior teams were eliminated from their playoffs. Philadelphia was slotted #13 going into the lottery. I can't imagine they would have used that many resources to watch Patrick that year. They very well may have seen him plenty in 2014-16 when Ivan Provorov was still in Brandon.
But they might have spent more time on Cale Makar that season. Makar was #12 on TSN's midseason ranking, so conceivably a guy in their ballpark draft position.
Unlike Hischier/Patrick who were done playing, Makar had six games after the draft lottery in the Junior A equivalent of the Memorial Cup where he took home MVP.
Very late in the draft process, Corey Pronman said he had sources telling him that New Jersey was considering Makar with the top pick. That was jarring at the time since most of us Devils fans had been picking apart Hischier/Patrick non-stop after the lottery.
I attended the 2017 Draft, so I actually didn't see some of the coverage until today.
Dreger mentioned that Vegas trying hard to move up to #1. It would have been Vegas swapping #6 to #3 with Dallas, then moving #3 to #1. Presumably Vegas would have taken Patrick then New Jersey was fine with Hischier or Makar at #3. Dreger and McKenzie both say that the Devils considered it.