David -
I've never caddied on the PGA tour or any professional tour. I have caddied for 10 years on and off and multiple Chicagoland courses, including Butler National and Black Sheep.
Does one need to have caddied "at a high level" to have an opinion on this matter?
Maybe Stevie DID try to get Adam to hit a driver or an iron on the 72nd hole, thereby taking the bunkers out of play, but Adam overruled him. Do we know if they had a conversation about it? I've not followed the story closely enough to know one way or the other.
I do not like Stevie, nor would I defend him. He seems like a total jerk in so many ways. But, ultimately, it is the player who gets the glory, in winning, and the blame, in losing. It is hard to make an accurate comment on this topic because none of us have any insight into the relationship between Adam and Stevie, or how much input Stevie has about shots played during a round, as well as course management.
To me, Adam lost the tournament with his play on 15-17. Poor approaches into greens from the middle of the fairway and 3 putting is what did him in. If he had handled his business on 15-17, very likely, we would not be having this discussion.