The team has no hope of getting anywhere further than an 8th seed sweep, so it doesn't seem to make a lot of sense to force your franchise stud player to play through injury (and risk long term issues) if you really have nothing to play for.
If I were them, I would probably do the same - let the guy rest, give it a go next year.
Davis is a top 5 player and only in his early 20's, you don't want to do anything to risk his long term health.
Earlier in the year they were starting to play well and looked like they might have a shot to make a playoff run, but that's fading now so may as well rest him.