It definitely does seem like an odd decision, though, to do it this way instead of just saying 'he's been playing hurt since the start of the season and we've just made the decision to shut him down for a few weeks to heal up'. As soon as the words 'personal reasons' are used for anything, it's like a bat signal for toxic fans to come out of the woodwork and act like total assholes.
My take is that we are going to start seeing a lot more of this from this organization. Just blanket zero info on certain issues, including chronic injuries, and chalking them up to "personal reasons."
The moment "injury" is said, the media doesn't leave the player alone about it anytime their play drops off. I think this organization is progressive in viewing player health as a personal issue that shouldn't be public, especially with chronic injuries.
This "personal reasons" label gives a bit more protection and privacy to the player from the media's direct questioning. Yeah the tin foil hats are going to go wild at first, but once we see these absences for "personal reasons" get normalized, that will likely calm down. It also creates a murkiness around the players so that if they do take leave for more scandalous reasons, the team won't have to signal anything to the media.