That strikes me as a very cynical view, and I consider myself to be a pretty cynical guy. You could also make the same argument about other market platforms:
I'd call the appraisal justified. At least from where I sit, I'd say that the equivalent to eBay or Uber would be listing stock from startups that also have VC funding, and selling actual shares in the company.
"Ebay - Buy things real shoppers won't"
"Uber - Get a ride somewhere real taxis won't go"
"Monster.com - Hire people real employers won't"
Is it really that different?