There's definitely some truth to that. I stopped drinking for a couple of months last year and it was amazing how I changed. All of sudden, even the thoughts of social events that inevitably involved other people drinking (which happen virtually every day where I live) seemed borderline intolerable. And even if I did decide to make an appearance at one of them, I was always the first one to leave. Conversations that I could previously carry on with certain people for a long time all of sudden felt unbearable after a few short minutes.
Now on the flip side of that, the positive was that I obviously never woke up feeling the effects of the night prior. So there were definitely mornings when my wife was hurting and I was buzzing around the house with max energy. But here's the thing. I was never the guy that had a desire to keep the partying going all night long anyway. For me, I've always had an internal regulator that says "Ok, I'm about over drinking and socializing for tonight. I'm done".
So then I go home, drink 16oz of water, take a couple of liver supplements, and then take another 16oz of water with me to bed in case I wake up to pee and then still feel thirsty after that.
So for me, yeah I can say without hesitation that I can be pretty boring in social situations when I'm not drinking. And during that couple of months of going dry, I learned why exactly that is. What alcohol enables me to do is basically be conversational about uninteresting topics in real-time because that's pretty much what most people want to talk about. Topics like local news, politics and sports are just not topics that interest me very much and if I'm completely sober, I will be bailing on the conversation quick. But if I have a little buzz going, I will sit there for significantly longer and do my best to accommodate whatever the current topic is.