Why people say "don't go looking for love, let love find you", is that a metaphor or do they mean it literally?

Because I'm single right now, I really want a girlfriend, but people always give advice by saying phrases like this " don't go looking for a girlfriend, let her find you, don't go looking for love, love will find you". I don't see how that can be true, because a girl will never ask a guy out, a girl will never pursue or chase a guy, it's always us guys to take the initiative and do the pursuing and chasing, asking the girl out. So why do people always say those phrases that I mentioned?
Why people say "don't go looking for love, let love find you", is that a metaphor or do they mean it literally?
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