The problem with Wanda being entirely at fault is that she's then guilty of brainwashing an entire town into playing out her sitcom fantasy with Vision's corpse against their will, with the potential threat of spreading her Hex further outward. Unless she's
completely insane she's crossed the
Moral Event Horizon, one that justifies throwing her into the Raft for the rest of her life and in turn validates everything Hayward's doing. She is at this point a straight-up villain, so having her skip out punishment to rehab with Dr. Strange is going to throw a lot of people off.
Hackneyed as it may be, there
needs to be
some kind of secret mastermind manipulating her against her own will to keep her anywhere in the ballpark of redeemable.