I agree and would be willing to bet ease of manipulation is why large businesses and corporations love to glorify young artists. The rest I think comes from a lot of weird cross-cultural stuff that exists where the nebulous concept of "talent" is worshipped far and above persistence. People want "prodigies" to exist both as legends and as excuses for not pursuing their own dreams. Someone once appraoched the violinist Isaac Stern after a concert and said "Oh, I'd give my life to play like you." "I did," was Stern's answer.
From experience, being worshipped for talent is a fantastic way to not develop the emotional and mental discipline to cope with being part of a wider world of skilled people, and how to react when things start being hard for you.
-signed Elder Millennial That Thought He Peaked In High School