I think it’s pretty favorable how Oda portrays the “live the lifestyle you want” idea, not just with humans like Kiku living as a woman, even though she was previously referred to as a brother, but also non-humans like Kawamatsu living as a kappa and Gonbe living as a cat, even though they were referred to as a fish man and rabbit at other times. Of course, it becomes problematic if you live the lifestyle of being a rude jerkass to others, but otherwise, it‘s very much great to live as one pleases.