You have the right to communicate freely -> encryption is just a form of (ostensibly garbled) communication -> you have the right to use encryption freely.
Nothing in that clause says the communication must be understandable or even interpretable by all people.
You could argue that freedom to communicate covers the use of encryption. If encryption was outlawed however, it wouldn't be the right for individuals to use it that would be outlawed, it would be the right for companies to sell products with strong encryption, or to do so without backdoors. That in turn would deny many the use of crypto, but it would not deny them the freedom to communicate.
I don't think outlawing maths or outlawing companies from making an iPhone that they themselves can't break into is even remotely possible. The conclusion from that is that what we have can't really be a war on crypto, it must simply be the noise of people who realized they already lost.
You have the right to communicate freely -> encryption is just a form of (ostensibly garbled) communication -> you have the right to use encryption freely.
Nothing in that clause says the communication must be understandable or even interpretable by all people.