I 100% support this. There are plenty of times where you might want to play as a female or male pirate when your 'default' pirate is the opposite, or simply a different body style just for the hell of it. Like a twiggy chick or a big ol' meatball dude. I'm very fond of my current loadout (went though multiple appearance options to get him just right over the years, so no @BurnBacon, there's no reason to replace them) and have zero desire to lose him by re-rolling the IPG yet again, but it would be nice to occasionally to get some use out of the three pages of dresses I've unlocked through seasonal progression and Twitch drops that would look absolutely ridiculous on my current guy but would be interesting to see or use on a female figure with a stature designed for its use.
There's absolutely nothing wrong with wanting to change up your character selection sometimes without losing the one you've put so much effort and time into.
Edit: I always see the same three annoying responses on topics like this as alternatives to implementing this, so let me save anyone the trouble of suggesting them:
"Just put your guy pirate in girl clothes/girl pirate in guy clothes."
-- No. That's stupid. It looks stupid. Historical accuracy of Anne Bonny aside, this is a fictional video game and I don't want my huge hulking pirate dude in a skirt but would like to someday get use out of the three different ones I've unlocked in my clothing box.
"Just re-roll your character using an appearance potion."
-- No. That's stupid. As stated above, I've gone through several to get my current loadout and like him just the way he is. Using one now to play as a female character once every few weeks when the mood strikes me is not worth losing all the work and REAL money I invested in getting my current primary toon just right. And I shouldn't have to be expected to lose him to play as another one, honestly.
"Just start a new game with a different account/login from scratch."
-- No. That's stupid. Again, as mentioned previously, I've got years of different outfits already unlocked on my current account that I would like to use that I would NOT have access to from a different new account, several of which are unavailable for purchase or unlocking now due to time-limited events/drops or just simply not wanting to spend doubloons on repurchasing something from a previous season I've already unlocked for free on my "main" account. And again, I shouldn't have to be expected to.
It's a request that has absolutely zero effect on any other person's game, playstyle or session other than their own, so there's not really any particular reason not to implement a relatively common request such as this.