So what does the owner do? as in they are just there or they do like a ton of the behind the scenes stuff.
What Highwon does is pretty well summed up here: https://www.seriousgmod.com/threads/new-users-guide.50928/ In short, handles anything business related, our sole developer at present, and is the final word word on any server, staff or rule related matter. The great majority of this is, as you say, behind the scenes, with the Lead admin(s) being the public side of the leadership.