A layperson might ask, What difference—besides diss’ing social scientists—does it make if these interesting articles about loneliness growing are off a bit? First, they are off a lot. But more important, they are a critical distraction. Chatter about feelings (of mainly affluent folks) distracts us from the many real crises of our time—say, widened inequality, children growing up in criminally and chemically dangerous neighborhoods, the dissolution of job security for middle Americans, drug addiction, housing shortages (where the jobs are), a medical system mess, hyper-partisanship, and so on. That’s what makes the loneliness scare not just annoying but also another drag on serious problem-solving.
Ahh the cruelty of science. I would agree that the claim Brooks, an op-ed writer, made is overblown and sensationalized a bit in order to get readers interested, but that doesn't make those who are indeed lonely, and those who the NY Times article focuses on, any less lonely or visible.
It seems like the post's author is dismissing that there are lonely people out there because Brooks wrote something that overstates their numbers. As any social scientist would tell you, even the best numbers we have on these phenomena are problematic and incomplete.