I guess you can interpret it as being about the insecurity and need for adulation of the performer. However well you may sing, unless you receive the eager approval of the audience/market, you will feel yourself to be worthless.

This would then allow the 'find yourself someone to love' ending to be read as the need for a performer to show (or fake) the kind of charisma that makes an audience feel that they genuinely care about the faceless multitude. In other words, a cynical suggestion to identify your target market, flash them a smile and a wink that make them think you love them, and then bask in the adulation they will send your way once you have pulled that on-stage con trick.

This is the great realisation of Justin Bieber: what truly matters about Anne Frank was whether she would have been a Belieber.

Maybe.