Yeah, the idea that Simmons doesn't fit on many rosters is really flawed. Maybe there aren't that many teams who can swing a trade AND have the assets Morey wants, but just on skillset Simmons would be a great fit in at least the following:
BKN, BOS, CHA, DET, WAS, NYK, TOR (if SIakam is outgoing), POR, MIN, OKC, LAC, GS (particularly if they move Draymond), DAL, SAC, HOU. That's a lot of teams. And most of the teams I left out it's because they already have a star who isn't a shooter and built around that.