When there's a passion and a desire to do something in life and it doesn't quite materialize the way you had imagined, there's a tendency to completely give up. American Idol is a perfect example. It is filled with contestants that can not sing, as you have witnessed. This does not mean they have to give up on the music industry. They may have the gift to write music, dance, play an instrument, etc.
My point is this; if YOUR plans don't work then maybe you should expand your view in the industry, career or business you wish to pursue. You may find there is something you never discovered about yourself.