Nobody is forcing you to add a LN address
Discussion
They're making me choose
It's basic privacy not having to disclose how much money you received. Broadcasting it to the world doesn't seem like a good idea
It's an open protocol where people are free to build whatever they want.
Simply use a wallet that doesn't have support for NIP-57 and your transactions won't be broadcast over Nostr. Or don't add a wallet at all and don't receive transactions. Power is in your hands to make your own choices.