When asking older parents (like, my parents age) for advice regarding our super light sleeper, no one seems to take it seriously. They all say she will "get used to" sleeping in not-perfectly-quiet environments (like a guest room during a family get together). But it seems to require forcing her to sleep in these environments often... which she just doesn't. She just skips naps and then sleeps a ton when we get home. We also sadly don't leave the house very often, so she's in our quiet home for most naps anyway, and would have no opportunity to "get used to" sleeping through sounds.
Have you had a light sleeper ever just get used to sleeping through sounds? She only does if in a carrier, where I can bounce her gently through the noise until she falls back asleep. So, not even then really.
And by light sleeper, I mean, she sleeping in our room until we move, and we actually change for bed and brush our teeth etc. in the second bathroom in the hall to not wake her, and we have a ZERO pillow talk policy, because whispers wake her. And every time I move a pillow I cringe, waiting to see if that wakes her too!