I think friendship comes naturally, some might say "organically."
I think a person telling other people that they have no friends as a way of obtaining friends is not a part of that natural process of friendship.
Some people may not be aware of that possible viewpoint, some may be aware of it, but lack the impulse control to prevent themselves from saying and using it anyway. Some may be looking for someone just like them. Maybe two people announcing that they have no friends have enough common ground to become friends. I don't know. That's outside my range of experience.