But as I said before, classes aren't jobs, they are skillsets.
...that a single corsair would decide "Actually, helping people is better than piracy and maybe ill take adoration and fame over the uncertainness of piracy"?...
Then they would cease to be "corsairs". They can't run around doing "good stealing", "good plundering", and "good miscellaneous pirate things". Their skillset would change with their decision.
I don't actually care what they are called, to be perfectly honest. But corsair is basically a synonym for pirate, and I don't think those "skillsets" are something positive. I think it would be better to call them something more like "mariner", which has a better connotation, but it's their business, not mine. They've screwed with the lore so much, that honestly I don't know why it even surprises people at this point. (Yes, I'm still kinda weird about rune keepers...even though I have an alt rune keeper, myself. : P)