Yeah, most of the advice is really bad, because they want to avoid the harsh truth: that things aren't necessarily going to work out. You can't sell a self-help book that teaches "you need people to love you but you might be left alone forever". People want a guaranteed solution but that simply doesn't exist.

However, a lot of people, like the person I originally replied to, choose to remain alone, and that's often because they are scared of rejection or of being left alone. It's kind of ironic, like a contradiction. Longing for connection, but being so scared of rejection that you force the rejection to happen yourself, so that it doesn't happen to you involuntarily, but by forcing that rejection through self-isolation you basically guarantee your doom rather than opening the possibility for flourishing.