Most GMs, if not all of them, come up through the ranks as an NBA player, coach, personnel guy, scout, etc. I see Harrison came from Nike with zero NBA personnel work and never sniffed a roster spot as a player. How often does that happen in North American sports where a man is hired to run an organization with zero pedigree within the league (or on a collegiate level* at minimum)?
He may get the chop this summer, probably rightfully so.
*Guys like Jimmy Johnson got the keys to a franchise in their first job in the league but he at least had been a head coach at the collegiate level for a decade leading up to. Dick Vermeil had a 14-year hiatus from the NFL when he returned as run the Rams football operations but he did have prior head coaching experience in the league.