It is worth noting that you can run Tor in non-exit mode, but still route (secure, encrypted) tunnels around for other Tor users. This is (ideally) how every Tor user should act, if at all possible.
True. In fact I personally do this. I really want to run an exit node, but I'm also terrified of having my apartment raided and turned upside down for traffic flowing out of my place.
To take your pedant to its extreme, though, using Tor Hidden Services entirely inside the Tor network is more secure than using a Tor exit node to access web sites outside of Tor.
If you hear about sites like the Silk Road, those exist only inside the Tor network, you can't (directly) reach them the 'actual internet' / the Web.
