Question:
How do Bitcoin and its blockchain actually work?
The real question here is:
Do we need to understand how it works to use it?
And the answer is "NO", just like your car engine, you don't ned to understand how the fuel becomes movements, you only need to know how to start it and drive it. And the same happens with Cryptos, people only need to understand how to send, receive and back up their address, that's all. The technical side is not a must for use it.
Actually the OP's intention was good to share knowledge and articles to help people who don't understand, but instead of directly discussing it there he just included a link.
I like the analogy you shared. It's true that we only have to study, understand and understand basic knowledge and we don't have to be required to fully understand the existing system to be able to use Bitcoin, but if you really understand everything maybe that's better.
If to be able to adopt or use Bitcoin, we have to understand all the workings of Blockcahin, then Bitcoin will only be used by certain experts.
This may be a bit of a fear for people who don't know or are beginners that there are some people who think that to be able to own Bitcoin one must have good competence or ability in the field of technology and computers.
Even though at first it was a little confusing for ordinary people who didn't really know what crypto and Bitcoin were, after they learned about it and eventually they would get used to it and understand.