We literally have scientific research showing that loneliness is just as bad for health as smoking, so please stop with this "you can be happy single" meme, it's not even funny at this point.
There's something about modern society that completely breaks the most basic human interactions, leaving people absurdly lonely. It's a pattern that can be seen in all countries: as the society gets more developed, people stop spending time with each other. What it exactly is remains elusive, but if the same statistic shows up across completely different cultures, then it's ignorant at best and evil at worst to put the blame on individuals for failing to thrive in an environment that sets them up for failure.