Can rock and roll be crowdsourced or should you look inside your own head?

Since reading about the announcement of a new ad agency called Victors and Spoils last week, I’ve been obsessing over the idea of crowdsourcing, which Wikipedia defines as:

the act of taking tasks traditionally performed by an employee or contractor, and outsourcing it to a group (crowd) of people or community in the form of an open call.

Crowdsourcing is how VS plans to change the ad agency model, moving from one in which all ideas come from in-house teams and the occasional freelancer to one in which ideas are crowdsourced, meaning VS puts out a call for ideas over the Internet, and then sifts through the voluntarily submitted responses. VS hopes that this approach will lead to better ideas. I have my doubts, but here’s a question: can rock and roll be crowdsourced? In other words, is a band or an individual better off writing their own material or sourcing it from others?

To find the answer, all we have to look at is bands that write their own material, such as The Beatles or the Rolling Stones vs. bands that don’t, such as the Monkees or the Backstreet Boys. We can also look at individuals, such as Bob Dylan, one of rock’s most prolific songwriters, vs. Michael Jackson, also prolific, but not above asking others to write material for him. In my opinion, it’s no contest. Artists that write their own deliver far better quality and far more moments of sublime genius than those who do not, or who rely on a combination of their own gifts and their ability to attract ideas from others. Why would this be? I have to think about this. What do you think the reason is? Comments are welcome!