I had that view semi-recently (a year or so ago): dinner+drinks is too expensive for my tastes. But I blame the "dinner" more than the "drinks" from a monetary perspective. Nowadays the usual arrangement among my friends & me is that we get together at someone's house, one of us cooks, then we go out for a few beers. The food is usually better, and we value the "bar outing" part of the atmosphere more than the "restaurant" part. So we save the $30-50 that the meal costs, which is a huge cash win, much more than saving the cost of a few beers would be.
But this is just an issue of where you want to spend your entertainment budget. I personally feel restaurant food is a huge ripoff, and that the ambience of a restaurant is not worth it. While I feel the $1-2 supermarket beer vs. $5-7 for a bar beer is a reasonable incremental price for the ambience. Maybe you feel drinks at bars are a huge ripoff, while restaurant meals are worth it. Spend your money as you wish either way! But then it just becomes an issue of personal budget preferences: I also think movies in theaters are huge ripoffs!
In general, it depends where, how often, and with whom he goes out. It does add up even with comparing "dinner" vs "dinner+drinks". Dinner+drinks if done often will add to quite a bit over time.
Mixed drinks can be ridiculously expensive. Not keeping up with 4,5 drink per night, or not buying the next round for example, will also raise the same question "why aren't you drinking". He'd probably be back writing the same article just saying "I am sick of people asking me why I only drink 1 drink a night and not 3".