I never thought about it before, but I wonder if there is a connection? - along the lines of "correct" and "just" (in the sense of ethically correct) being the opposite of bad / evil? Some people here [1] think so, but "right" appears to have Germanic roots (but then again, perhaps the idea of right/good and left/bad may predate the Romans, and maybe goes back to the time of proto- Indo-European, or even further.)

"Right" also has the meaning of "upright" (as in right angle) or, archaically, as "straight", and the normal processing path might be regarded as the straight one in the railway metaphor.

[1] https://www.reddit.com/r/etymology/comments/2cdshk/etymology...