You're right. This isn't the popular way to use EOS unless you're a system admin. If you are, then you probably figured it out on your own and don't need to read this. For those in the middle like me who spent days teaching myself how to figure it out, I hope this helps a few people get a faster start than I had. I never used Docker before and never downloaded EOS until the ETH contract closed. It was a big learning curve for me.
RE: EOS cleos Docker Windows walkthrough