I don't go to a restaurant just to eat. It's a social event. I go to hang out with friends, people watch, and just be around people. You can order in if you really hate human interaction that much.
A social event with the waitstaff? No one is saying that you can't talk to the restaurant staff, even when using a tablet -- you just aren't beholden to them for service.
Actually, yes. Does that sound crazy? I'm not talking about bad servers, I'm talking about good servers. Also, servers let me ask questions and help me discover new food I would probably not try. That's just me though, maybe I'm special.
You aren't unusual. A good server will beat automation hands down. It's the power of a bad server to fore a bad experience upon me which makes me love the tablet as an option.