Privacy and guns can be used for defense. Beards generally don’t affect that (though Alexander was of a different opinion and made his soldiers shave so that they couldn’t be grabbed by the beard ; I think same was the reasoning for Roman soldiers shaving their beards and other hair).
You can’t murder a room full of children with pgp.
I’ll just say it again in the hope that it might dawn on you that the two things are not even remotely similar enough that you can say “this also works for guns”.
I’ve already described specifically how they are similar, it might dawn on you that repetition doesn’t strengthen an argument. Not hopeful though.
What? That they can both be used for defense? Name something that couldn’t ever be used for defense. Your comparison is pointless because the only trait they share is one which is also shared by pretty much everything else on the planet. Like beards, to bring up an earlier example.
