Thank you for writing and sharing this-- this makes it very CLEAR what's what. I think a lot of people-- and this will get "worse" as Steemit becomes more and more mainstream-- are confused about a site that seems to have (in street terms) "so many passwords."
Public keys, private keys, and different keys to do different things. Most web sites-- as you know-- have ONE password. End of story.
It's important for people to know exactly what each of these ARE and what they DO.
Resteeming.
Thanks and glad you find this useful :)