Those kinds of people (typically upper middle class Americans born in the 1980s or later) are so in love with themselves that they just have no room for falling in love with anyone else. It's easier to waste time on Tinder while obsessing about the best place to go for overpriced brunch and then cry about it to your therapist while your friends tell you that "omg you're the best in the world, of course you shouldn't settle for anything", than to pursue deeper, more meaningful interests and relationships.
My very unscientific and cynical view of that is that modern consumerist American culture is reaching the paroxysm of fuckery, encouraging everyone to treat their relationships and fellow humans as fungible goods that should be swapped out for this year's new, better, shinier model. My solution has just been to just not waste my time with people whose life tends to exhibit the patterns described in the article.
If you too belong to the higher upper middle class but can't stand that kind of crap, go volunteer and meet people from outside of your social strata. I've been dating someone from a very different, non western culture for the past month or two, whose struggles include more than just what they're going to post on their blog next, and it's a breath of fresh air in comparison.
YMMV.