Roy made it clear that Jensen's advice is to monitor his minutes. "Who's decision it is" boils down to who's voice is most important, and that may well be Roy's. Perhaps it is McMillan's. In pretty much no sports franchise is it the head of the training or medical staff.
Blaming Jensen (and maybe you're not...saying that the national media will is ambiguous as to where you, personally, stand) for giving advice to be cautious and then being ignored because Roy wants to let it rip is not reasonable, IMO.