How are devolved local states equivalent to private landlords? States capture land value via land tax and socialise this. Private landlords capture it and keep it.
Are you referring to a feudal lord as a "private landlord" or a "devolved local state"? Both would be more or less fully appropriate.
"Devolved local state" is slightly more accurate than "private landlord", because unlike a landlord in a more commercialized society, a feudal lord was not legally able to sell the land he owned. He was legally able to govern it.
Night and day.