Sometimes, coaches just hit a point where you can't imagine them on the sidelines next September. If you did, it would be like admitting your season is over before it started. Imagine that say Arthur Smith was still with the Falcons, ready to waste Pitts and Bijan for another year in 2024. You can't.
If the Eagles get rolled by a middle of the pack Buccaneers team, where Hurts and the passing game are just lost, and the defense is bleeding yards, and Sirianni is throwing a tantrum on the sidelines... can you imagine that guy reloading and being ready to lead the team next September? You can't. He's already lost the team IMO, and a wild card loss would just cement that.