Here are some examples of how both a gun and encryption can be used for the same end goal.
X can secure a financial transaction
X can stop a thief from obtaining my credit card information
X can stop someone from forcibly obtaining my identity
X can stop an attacker from obtaining private data stored in my home.
The only thing I've been able to think of that applies to encryption and does not apply to a gun is:
Encryption can verify that a message actually came from me by decrypting it using my public key.
This is objectively true for encryption and objectively false for a firearm. Also a firearm doesn't really help with anything on the internet except maybe a shady craigslist transaction in a dark parking lot. But I meant to imply that a realistic and suitable physical analogy can be applied.
People will use force to take advantage of your moral stand against violence and make you comply to things you do not agree to.
We both abhor violence. The difference is I refuse to be victimized by it.
I feel (part of) the reason your society is in political gridlock is because everyone keeps looking for that mythical "objective" proof that ensures a 100% victory for their side. But that's just another unicorn.