Just box ticking really.
Mm, could've been to make things seem outwardly continuing as normal, could've been to avoid any flak about his "disappearance" as it seemed at the time and cause any unnecessary bother, could've been to make him feel still part of the club while continuing his recovery, could've just been to make up numbers, there's a number of things you could read into it. None of which are as important in the grand scheme as his health, of course. Nothing else matters.