Dick, if you were singing that, you'd have been an enslaved Black person, singing to other enslaved Black people about the cruelty of a "master," and I doubt you'd be much concerned with the N-word offending anybody since it was one of your everyday words.
The point in sharing the text was to see the "Ranzo" theme sung during corn shuckings in pre-Emancipation time (pre-1863/65).
Since "Ranzo" isn't documented for a sailing ship context until, perhaps, 1868, and because casual discussants have tend to orient their speculations about Ranzo toward sailing themes, pieces of evidence like this are significant for helping to uncover the deeper history of the song and its possible meanings.