That's not unusual. Theses surgeries, most of the time, are laparoscopic. Your sibling having the procedure can't drive and they don't want to risk someone not being available when they need them to help their family member home. The procedure usually takes 30 to 45 minutes to complete, so is short and family often joins in recovery as they come out of anethesia. Covid may have changed things a little. But it is a pretty common practice.