I strongly disagree. Experiencing concepts first-hand through experiments improves learning and understanding, excites curiosity, and teaches practices that can be used in other disciplines.

I learned about many physics concepts with simple experiments in elementary school. They can certainly be extended and adapted for an adult audience.

What you say is true about learning physics. Not valid criticism against this site.

It's not meant to be the only source for learning physics. It is focused reference site for concepts. Having focus and focusing on just one viewpoint is a good thing.