Yes, this is true... when I think of things like this, as a Sikh, I wouldn't wear chura or kaleerai for the reason Hindus did. If you wanted to do it for your own khushi without any superstitions, just for yourself, I don't see it as bad.
It's like if you go out with flashy clothes just so you can attract boys etc is wrong, but if you were to go out wearing the same clothes just for yourself without trying to impress people, I wouldn't see it as bad (obviously depending on what the clothes were)