I don't believe it to be true, I think it's more like putting yourself out there, be social, be positive and always make an effort to meet new people but every person you meet doesn't have to be a potential partner.
The last time I met someone came as a surprise. Prior to that, I was trying to hook up with this girl at work and it didn't work out, I was bummed out, I went drinking with my usual friends and met a girl in the group that I haven't seen before. We talked and enjoyed each other's company that night and didn't really think of her as a date at that point. We eventually did date (although it didn't work out in the end).
But the point is, I could have decided to be at home feeling miserable by myself, but I decided to go drinking with my friends that night. If I didn't, I probably wouldn't have met her.
That's why I tell myself, just keep meeting new people. Someone has to be out there.