Someone who can’t cope with the hard work of relationships should stay single.
Committed relationships take work and compromise.
If a person isn’t willing to put in this kind of effort, it is best that they stay single.
They can still date casually if they want.
However, they shouldn’t date someone who is looking for a serious relationship.
Doing so would only lead to a waste of that person’s time, as well as the possibility of heartbreak.