If someone is going through that trouble the same is true of your communication. Someone could record comms from you to bitwarden, watch as the app does it’s database sync, and record it for later decryption. But the same is true of your KeePass unless you only sync by hand on a private network.
As someone posted above, someone obtaining access to your encrypted data might lead to an issue in the future:
https://en.wikipedia.org/wiki/Harvest_now,_decrypt_later
If someone is going through that trouble the same is true of your communication. Someone could record comms from you to bitwarden, watch as the app does it’s database sync, and record it for later decryption. But the same is true of your KeePass unless you only sync by hand on a private network.