Joel Embiid’s injury history is no longer a footnote to his career. It is the central fact around which everything else must be organized. The talent has never been in doubt — when available and healthy, he operates at a level very few centers in NBA history have matched. The availability is the problem, and it has hardened from a concern into a pattern. The Sixers have built and rebuilt around the assumption that Embiid’s peak is worth the structural risk.