If you want to frame it as a life-saving feature, it should be on by default and impossible to turn off, or at the very least should be a required prompt during initial phone setup.
I'm asking for something that will make more people more secure, since I personally know plenty of people who want iMessage security, but for the web to still be functional (i.e. JIT to work).
> If they have the option to turn off the life saving measure they will
Then they'll just turn off all of lockdown mode, like they do now, to see a good friend's photo album. Great.
... I feel like we're talking past each other, and frankly with your tone of voice you're clearly not going to listen to anything anyone says on this, so there's not really any point in having this discussion at all.