Yeah, but the more people that are active in the group, the more people there are to volunteer. Have you guys had a problem finding people to lead rides yet? If nobody has volunteered and there is no ride scheduled, then get a discussion going in this thread and try and get someone to volunteer.
The world isn't going to end, and this group isn't going to disband if one weekend goes by without a ride. You're overthinking this.
You would eventually meet him on a ride and find out. You should use this thread for organizing rides, trash talking, etc. and just use Strava to actually post the rides. Then people don't have to follow this thread at all but can still show up to a fun, chill ride with people when it's convenient for them.