The video is more about Ian's narrow-minded view on things. This isn't a dig on him in particular, I think the ability to be open to different ways of doing things comes with experience and his attitude is typical of young men his age.
For Ian to say he's trying to save people who never have a chance of turning IFBB pro from wasting their lives show's that he's never been on a journey long enough to learn from it. Having a goal is often more important than achieving one.
The whole thing for me was a little boy being taught lessons by a grown man. Ian had done no research on Dave prior to the discussion and came in showing him no respect. Whether he realised it or not, Dave has taught him some valuable lessons.
I will finish by saying that this is my first experience of watching Ian's opinions.