I think you've touched on the base problem of both sides of the argument -- it's a UX issue.

Facebook has given too much power to the 'like' button. There should be a different 'follow' or 'subscribe' button. If you subscribe to a page, you would expect to always get updates from it.

I only subscribed to facebook to be able to watch some dev videos. As I slowly became more used to it, I wanted to know how to get updates from the company page I work for. When I asked how to do this and was told to 'like' the company, that made no sense to me. What if I don't actually "like" something, but I still want to watch its activity?