Legit question, what makes you say Simmons is a top 15 player because many of us don’t see that….and it’s not a slight to say that either. Yes, we all know the D is great. Is Gobert a top 15 player?
If you mathed it out, yeah, Gobert is probably pretty close to a top 15 player. He's not much lower than 23-25 range, that's for sure. Simmons is more valuable than Gobert because of the positional limitations of a big man and Simmons playmaking/ball-handling abilities. Along with great efficiency on low shot attempts.
The D just isn't great, his legit high level defensive versatility to defend anyone and any position. He's right there in the conversation with Giannis/Jrue/Gobert as the best defender in the NBA.
He's the best wing rebounder in the NBA. He's a top 10 passer/playmaker. He'd be unreal in an uptempo/transition/high pace team, but the Sixers won't play that way with Embiid. And for the all the whining about his scoring, he's been 14-16 PPG on a minimum 58%+ TS the last 3 years. That's really good.
So, to summarize:
-Top 3-5 defender, regardless of position
-Best wing rebounder
-Top 10 creator/inherent value of being a 6'10 ball-handler/playmaker.
-Nightmare in transition if he was on a team that would push pace.
-2nd best player on a top 5-7 team in the NBA the last 4 seasons. Constant 50+ win pace.
The shot and FT shooting really does hold him back from being in top 5 consideration, but he's basically at or near the top of the list in basically every other aspect of basketball. That's why he's a top 15 player.