Joel Embiid has heard all of the chatter about the awkward fit between he and fellow Philadelphia 76ers All-Star Ben Simmons on the court, and whether the two of them are capable of winning at the highest levels playing together — noises that have only grown louder as the Sixers entered the All-Star Break in fifth place in the NBA’s Eastern Conference. He has a message for the doubters: just wait. “I think it’s BS,” Embiid said here Saturday morning before All-Star practice, “because when you look at the last couple years, the last two years that we’ve been playing together, it’s not a problem. This year it’s only been a problem because our offense has struggled.”