I think there is good stuff out there, and I don't put your youtube watching in the same class as lots of the subscription content. Honestly, I think some of what youtube creators make is more valuable than what studios are spending millions on.
I was just surprised that after signing up for Prime, I thought I'd get a good few nights of viewing, but I seriously struggle to find anything worthwhile.
I still love Ken Burns docos, I really enjoyed Air, but I think most people are sucked into TV, and almost don't consider other options.
I think your friend is right that for most people it is mindless consumption. I think most people treat food as mindless consumption as well, and look where that has left the general population.
I think you've got the right approach of being selective of what you watch.