I am glad you had fun writing that blog post but, for any purpose that matters: Yes, it is possible. And we are already seeing the pathway to it

1. Increasingly build a narrative that encrypted communication is for CSAM. The tor crowd are already doing a good job of providing fuel for this.
2. Argue "terrorism" for the rest. "Fortunately" people have realized the mess in Israel/Palestine is a lot more complicated, but it is only a matter of time
3. Strongly pressure/incentivize the major app/social media companies either disable it at the app level or maintain internal keys to decrypt messages (effectively disabling it)

End result? Only "tech savvy" people will know how to set up their own entirely parallel "internets" (similar to tor). And then the phone and OS app stores increasingly lock down on third party apps for "security". Hell, I can even see a world where Redhat and Ubuntu strongly discourage these tools from being allowed in any official repositories because they want the government contracts for their premium OSes.

Will e2e truly be "banned"? No. But the only people doing it have insanely janky phones and linux.users with laptops. Which means it is nigh useless for the vast majority of whistleblowers and that "secretly being gay or a woman" becomes a huge mess where the vast majority of people will never understand how to protect themselves.