you made which is *exactly* why I used the term "pushed out".
Take almost any scenario where QBs or 5th years have left... similar to Tyree. The resounding answers have always been something like, "we appreciate your time here, you have your degree, but we're going a different direction."
To your point, this was a bad coaching move IMO in Tyree's case as he could have been easily as productive as Harrison and Mitchell. And, as an injured player at UVA this season, his stats align with theirs. What Tyree offered these guys do not was his leadership, his having been at ND forever and not having to relearn a new place. This would have been a key thing that could have benefited this team and the younger WRs. His ability to show younger guys the ropes and the ND ropes could have been like having an extra coach. A player that has proven to be productive on Saturday's at ND in the past.
I have no idea, but it's hard to imagine that with the WR mass exodus and house cleaning that took place last year, that ND was saying or giving the vibe that they were extremely grateful to have Tyree coming back.
Based on the shambles of that room, it is hard to buy into the staff considering him playing meaningful minutes and being a meaningful contributor in 2024.
Could Tyree have been offered better NIL money? Sure. Could he have known RL was what he is, probably. Could he have wanted to go play back at home? Maybe.
But, putting together the situation in that room, seeing the exodus at that position and seeing coaches (specifically at ND) reach in the portal and fall victim to "the grass is always greener". I'd put my money on he was "pushed out", by the staff not being as excited about Tyree as who they saw in the portal, and they likely didn't portray that in his anticipated role either.
Remember, there are plenty of past cases of this. So, is it conjecture? Yes. Does it align with the scientific method? Abosolutely. Could it be wrong 100%, but I'd lay low odds on it.