To be fair, just a little, there was no clear number one overall pick that year and GMs apparently dreaded getting that pick because of that reason. The best prospect, Noel, went down with an ACL injury and was going to miss the year(and every single team that could have picked him should have) and everyone else was pretty meh.
I mean the best players in that draft went 14th(Giannis) and 27th(Rudy Gobert).
Nah, this was an instance of Chris Grant trying to be the smartest guy in the room.