Interesting point. You've missed touching on why crowd-sourcing is available and why clients are turning to the resource.
The perspective is well appreciated being from young designers, but quite literally, crowdsourcing is not a new concept.
Self service is the original format, and were you to look further back, so is printing, propaganda design, the genre of constructivism, and the long evolution of graphic design itself.
The demand is clear.
I recently had a conversation with a local chapter of the AIGA on the topic, referencing a recent contest of theirs to GAP Corporation having turned to the service - it is a service - rather than rely on agencies or studios, for their logo redesign.
My point as someone who has a little bit of marketing to make himself self- endangering - - but who also has an interest to secure a degree, phew! - - is that we as creatives need to look at who we work for.
A client, in today's terminology is the consumer.
The corporation who has, as all rights allow, affords and secure, the consumer's ear as guide and mentor for any topic including those on aesthetic, purpose, goal, intent and appeal should rely on the consumer when ever and where ever possible.
Crowdsourcing is best described as part of the "design" in use to communicate with them.
It's not a pleasant thing arguing with clients a "devalued" role for premise of a creative. Which of course if fault of the creative. It's much easier and smarter to be smarter. To know what will work and why, and how far a why will work.
More importantly to know how to make a "far" and a "why" work together.
Crowdsourcing is part of that median.
But back to the current concern. In general, designers have been suffering from a distinct split in our psychology.
Art vs commerce, culture vs business.
I've always said to others, if you want to be an artist, be an artists, graphic design has evolved too far to be an artists' retreat.
Really... illustrators are so much better, more skilled and faster at "designs" popular these days than a GD.
If you want to be a communicator who takes part in driving an economy, business, changing society step by step, and building bridges - across issues, across hostilities, across oceans... Welcome aboard.
If you'd like to make a mark in life, really do something different, write. Be an artists and write with your business skills. Write about life. Write about anything. You can pick up just about any tools these days. A pen. A pencil. A paint brush. A travel ticket. A permit. A survey. A Chisel. A Stage. A petition.