you don't have responsibility for washing yourself before going to a mass transport vehicle full of people. it's within your rights not to do that and be the smelliest person in the bus.

does it mean it's right or professional?

getting your point, but i hope you get the point i make as well, that just because you have no responsibility for something doesn't mean you're right or not unethical for doing or not doing that thing. so i feel like you're losing the point a little.