There's a case to be made that encryption/private communication has gone through the same sort of progress as personal weaponry has, only on a much shorter time frame and to a much greater extent.

In weaponry, it's taken ~200 years to go from bespoke muskets with a firing rate of a couple rounds per minute to semi-automatic and automatic weapons capable of firing multiple rounds per second.

In just the last 20-30 years we've gone from "if the government wants to know your speech, they are a warrant(-ish) away from getting it" to "as long as you don't make a mistake, no one will ever know what you said."

To be clear, I'm not advocating for encryption restrictions. I'm just saying that almost no one advocates for the 2nd amendment right to a bazooka, and it could reasonably be argued that a bazooka isn't remotely equivalent to the present ability of just about anyone to conceal their speech.