cinderella –
You are right that tznius is a way of life. But tznius is not about showing things to the world.
It is not tznius to show off your body. But it is also not tznius to show off your internal self. The pasuk says ?????????? ????? ??? ?????????. It isn’t talking specifically about women, and I don’t believe it is talking about clothing. The word tzanua literally means hidden. You can hide physically and you can hide by not broadcasting your personal, deep, internal relationship with God.
Consider human relationships for example. It is proper and even expected that a person show a certain amount of love for their significant other in public. If that affection is not shown then they must be lacking in their relationship. But at the same time, to publicly display past a certain point is superficial and distasteful, even vulgar. Not just because of “pritzus” issues. But because there is a certain depth to the relationship which is so rich that it is not possible to be shared with others, and when one tries to show it off it gets watered down, so why would you want to show it off?
Tznius is about hiding something. It is not about showing off anything, even good things. ?????????? ????? ??? ????????? tells us that there is an aspect of our relationship with God that we should keep private. It might be that there is value in showing off certain things in a certain refined way, but that is not the parsha of tznius, that’s something else. Tznius is about the value of keeping it to yourself.