The square-bracket clarifications here are meta-text designed to absolutely clarify the intended reading of the preceding text, so that the reader can contrast their understanding with the intended one.
There is no suggestion that one would do this in "regular" text.
I mean first off: no the exact same image is conjured because we are reading this in context of knowing who jfk and stalin are and we know they aren't strippers and all language is contextual.
That said:
We invited the stripper, JFK, and Stalin to the party.
We invited the stripper, JFK and Stalin to the party.
The supposed ambiguity is back. Although again there is no ambiguity to the reader. The juxtaposition of the two versions wouldn't work as a joke if there was any ambiguity
We invited the strippers, JFK, and Stalin to the party. [three groups invited - strippers, a president, and a premier]
We invited the strippers, JFK and Stalin to the party. [the president and premier are strippers]
Very different visual conjured by those two sentences.