First of all, I'm talking about both production and efficiency.  And I'm not talking at all about the details on the inputs--just the results.
Second, I didn't say that being on the floor with Dame lowers his efficiency; just that he has, in fact, been less efficient with Dame than without him.  Why that happens to be the case, you are welcome to analyze or speculate.
		
		
	 
well, it does show Ant did better as a PG last season, but context is important.
When Ant played PG last season, he was primarily going against 2nd unit PG's as Dame sat. And if you watched the Blazers last season, it was almost an unspoken rule that when Dame sat, the other teams sat their best perimeter defenders; they wanted them resting at the same time Dame was. So it could be safe to assume that when Ant played PG he was generally going against lesser players and lesser defenders and not getting the type of attention a starting PG would normally get
as for efficiency, there really wasn't the large gap you claim. His eFG% as a PG was .560; and as a SG was .546 (
his overall eFG% was .548 and mathematically I'd expect it to be a bit higher if he really did play 36% of his time at PG as 82games claims; 
somewhere north of .550, but I guess that's not a major discrepancy). As for his passing efficiency, which is pretty important for a PG, Simons had an assist/turnover ratio of 2.04 as a SG and 1.89 as a PG (
which is pretty bad for a PG). His passing efficiency dropped as a PG. So, a slight increase in scoring efficiency offset by a drop in passing efficiency.
which brings up production and that page you referenced highlights what I've been saying and that's that the only really 
significant difference in production and efficiency is volume. Per/48, according to 82 games, Ant averaged 21.5 FGA as a SG, and 27.4 FGA as a PG. So, normalizing by his 35 minutes a game, he averaged 20.0 shots at a PG and 15.7 shots as a SG. Well, who the hell wouldn't have more production when getting 4.3 more shots a game at a specific position?
to Ant's credit his efficiency didn't drop when he increased his volume, but again, who was defending him at PG and who was at SG?
(
by the way, the 2021-22 numbers at 82 games show pretty much the same with only minor differences)
in other words, Ant really doesn't transform into a different player when he plays PG. He just graduates to a #1 option on a bad team. The biggest changes are volume and resistance. And that leads into another set of questions. Why did Portland draft Scoot and keep Ant if Ant is better as a PG? Staring Scoot at PG essentially pushed Ant to SG just like he was playing with Dame. And many people are excited about the potential of Scoot as a pass-first PG (
whatever that really means). Well, with Ant, Portland would have even more a shoot-first PG than Dame was; Ant averaged 7.0 assists/48 and 27.4 FGA; Dame averaged 9.8 assists and 27.8 FGA. That's Ant averaging an assist every 3.9 shots while Dame averaged an assist every 2.8 shots
square-peg/round-hole?....a shoot-first backup PG appears to be his best role; and, undersized starting SG appears to be his worst