Question

Hello Rabbi,
Recently I started wondering: why does a woman need to cover herself so much? What is the problem with a woman wearing pants that reveal a bit of her body? I’m talking about exposing the body not for sexual purposes, not in order to entice those around her, but simply because it’s more comfortable that way, that’s what everyone does. That’s the norm.
So my question is this: do you think there is something problematic about exposing the body itself, to a certain degree, in and of itself (that is, is there a problem in the very exposure)? And if so, what is the problem with it?
And another question: it is clear to us (and correct me if you think otherwise) that there is a certain gap between the norm in religious society and the norm in the Western world regarding modesty. Likewise, you can see that over the years the Western world has been moving in a certain direction on the issue of modesty (more freedom, fewer restrictions, etc.), and the religious world follows in its wake. That creates a relatively constant gap between the two worlds, as a result of both moving in the same direction and neither one staying in place. For example, if in the past it was very rare to see a religious girl wearing pants, today it is fairly common. Therefore, if all this modesty is a matter of social convention, and the convention changes over time (and from place to place) — how can one determine what is modest and what is not? After all, each person and each era has its own approach.
It came out a bit disorganized because I’m pretty confused, but I’d still be happy if you answered the two questions. Please answer the first with no connection at all to Jewish law or religion, only on the level of ideas, and answer the second in connection with the religious world.
Thank you very much in advance!