Yes, but they can increase the security. Say they use something like a @ColdCard Q for PGP.

Imagine signing a PGP message to a group of white listed public PGP keys on this newfanfgled Q. Then, it animates a BBQR the Vice POTUS can scan with his phone.

📲

Next, he broadcasts the PGP ciphertext to the group on Signal. Perhaps he leaks the ciphertext to a journalist. Woops. So what?

Let's say the journalist is a spy, hypothetically, an enemy of the state. He prints the Ciphertext in the New York Times.

So what?