I tend to agree; that said, it would not be insane to ask that question either, as the team is playing very well now and adding parts in a somewhat unclear overall NBA landscape is a viable approach, too. Put a different way, why assume that adding the right couple supporting pieces wouldn't put Philly over the top? Not every team is a superteam, though as we've often discussed in this forum most teams have two stars.A couple of solid pieces probably sacrifices a year of Embiid too. Maybe longer if it complicates future moves.
If a return like that doesn't put Philly over the top, might as well wait. A deal like that will still be there when all other avenues are exhausted.