> can we just read something like https://hpbn.co/transport-layer-security-tls/ ?

Yep, we have that option and lots of explanations like that already exist.

This is a different approach to explaining the subject. I don't see how that's a problem. Personally I think they just went overboard with it (to the point of being distracting), but I get what they're trying to do and appreciate the effort - even if it's not for me. Kudos I say. Others might find it useful. Plus it could inspire someone else to explore another approach.