Do most people only use a GPS only for current position, backtracking, trip computer funtions and geocaching?

Can you find a waypoint for hiking to a campsite, a trailhead, or other destinations not found on topo maps? it seems hard to find a useful waypoint or lat and long for hiking, is their a website that lists them or a forum or something where people share waypoints and tracks, I have found things for some states but nothing for Michigan, am I expecting too much from a GPS? I'm ok with it if this is not something people do I just thought that most people used them to get somewhere they have not been before (following a track they layed out with their unit)