Wow. What a civil and mature contribution. "Shut up" in all caps like this is the comments section of a YouTube video instead of a forum for adults to have respectful debates.
I know a lot about the Second World War too. I know more about my Army bud's Abrams tank than he does.
Is experience a wholly different animal than knowledge? Yup. In no way does that negate the possibility of correct information without hands on anecdotal experience. The lack of firsthand experience is absolutely unnecessary for the formation of valid knowledge.