"You should" begins what actions I suggest you do in order to mitigate the outside forces that are happening whether you like them or not. The outside world is certain. Your response is something you can influence.
The world sucks. You get to choose your response and if you choose wrong your business gets Darwinned. I've told you what actions I think will avoid your business getting Darwinned, but your response has been denial. Your response was essentially: "wow, fuck you for telling me the world sucks. Here's a non sequitur to try and make you feel bad."
The first two words of the first comment are “You should” then your follow up grammatically evaluates to “I’m not telling you what should happen”.
All they did is point out that suggesting people should post to YouTube exacerbates the network effects you allude to.