I'm not sure it's a good idea to talk to a player about a trade, before it happens, so there is that aspect.
The reports, up to that time, were that teh Sox were interested in AB, but likely as a 2Bman. I'm not sure Devers was following these stories, or not.
Once we knew he was coming to Boston, I do think they had the responsibility and need to talk to Devers as soon as possible, and preferably face-to-face. Apparently, they did talk, but when, and for how long and how did the talks go, is unknown.
I don't blame Devers for saying he views himself as the 3Bman. I don't agree with him that he is a good 3Bman, but I understand most players think highly of themselves. That unwavering confidence in themselves is part of what made them great.
Devers sees himself as a 3Bman. There is nothing wrong with that and voicing that opinion. He made no statement or implication that he'd refuse to DH, yet that was headlined. I still can't see why you defend that blatant mischaracterization, at worst or reading into statements things that are not known to be true, at best.