Hey, I don't like the naive techno-optimist prevalent in many technology events, but that doesn't in any way make me excluded. It just means I might have a different attitude and hold a minority opinion compared to my peers, and that I find myself bored and wanting to leave listening to some Singularity Guru. Same thing goes with alcohol: if you don't like, don't drink. If you feel like the event is too immature, don't show up or organize your own events.
The reason there's so much alcohol (though I haven't really come across the binge drinking he's talking about) is because it acts as a social lubricant, which turns out to be useful for many people, plus it's a nice freebie for companies, just like pizzas (don't eat it if you don't like it).