> Not to be snarky, but isn't [that] the SV business model. Facebook 'are not a publisher', because editors cost too much. Uber are 'not an employer', because proper benefits cost too much..etc ad infinitum

I totally agree with you, it is. Responsibility is a barrier to scaling and other selfish goals, so their "clever hack" is to try to be as irresponsible as they can get away with.