If you watch the interview, Valve is still pretty damn optimistic about it.

It's just that they see it as an ongoing experiment so they're okay with this iteration of it failing probably because they haven't bet the farm on it.

I understand your perspective, but don't agree with the underlying message. Optimism is what encourages people to take risks. Ultimately, all progress depends on those who are hopelessly optimistic - even if they end up failing in their endeavors.