Another way to consider this is that people find it easier to divert themselves than to exert themselves only to be disappointed. (Think of the universal pain of the characters in "Marty". [1])
Even though the cost to "view" people has been cheapened by technology, what we find is that disappointment remains the likeliest outcome.
The article is written for humour, but it is worth noting that although "sex" cannot go out of fashion, the illusions of Bernaysian manipulation [2] certainly can. And, as a society with a changing set of prevailing group behaviours, the delights of companionship can certainly be lost.
An enjoyable sexual relationship isn't just a matter of presenting (or hunting for) some pastiche of beauty: people must want to charm and please one another. This cultural trait definitely has gone "out of fashion" in Western society.
Add to these discouraging considerations the fact that the financial calculation of a relationship (even if children are not planned) has much more risk today than even just 10 years ago.