I don't think it's malpractice. The lack of a fourth starter didn't cost them last year or in 2022. They did get Thor in 2022 who was needed as an upgrade over Gibson and Falter, but there was no reason to think Ranger wouldn't come back okay or even that Turnbull would be hurt for so long. There was no way they were going to acquire someone who was anything other than a fringe 4/5 and Ranger still is that. They did that last year too with Lorenzen and it was a complete failure.
I still have faith in Ranger too, maybe in a more limited role but that was going to be the case for him and Sanchez anyway probably.