Co-Host is actually focused on just helping streamers host their events.
Event Team members were also given a chance to join the Co-Host team before applications started.
There’s also a higher demand for Co-Hosts than the amount of Event Members and some Event Members are not active on the Event server at all, and it wouldn’t make sense to give the inactive Event members Co-Host since mostly everything works different on the Event server than it does during Kit or WW events.
Co-Host is basically just event but renamed so people can easily understand what they do on the Event server.