The majority of the people follow simplicity and conformity. A girl can be liberal in political views and modest in clothing at the same time.
One can support freedom of speech, democracy, equality and have no need to bare skin.
One can be a nudist and oppose any and all liberal ideals.
The problem is when you view the world with western eyes and not make a mind of your own. You said it the majority does it, so it must be okay. It just makes you another sheep in the herd, doesn't make you right.
I have seen liberal , conservative and third hypocrite too.
Liberal have nothing to do much with your physical outlook but more with your mental oulook.
Conservative want Physical and mental outlook to be synchronous.
Hypocrite has asynchronous physical and mental outlook.
See where you fit.