YouTube has exposed the truth: There is no shortage of people in the world who have heaps of talent. For all manner of things. Used to be, folks figured some popular singer was some kind of special, for example. We now know great singers are essentially a dime a dozen.
But unless you get lucky and hook up with quality management and quality songwriters and producers, you're going nowhere.
And it also helps hugely if you're attractive. Look at Swift, Underwood, Perry, etc. And if you're not good looking, you'd better have a unique and interesting look. Lady Ga Ga, for example.