So you expect aging parents to actively ask their children to put controls on their devices, and not to reverse that decision when it matters most?

Many, probably most, of the people most at risk aren't going to do that.

When you're (somewhat) drunk, you know that you're drunk, and you're still able to comprehend how that will slow down your reactions while driving. When you're being scammed, you think you're right... and if you begin to doubt that, you may tend to push the thought out of your mind rather than follow it through, and to evade things that might bring it back. And it's very hard to admit to yourself that you're permanently impaired in that sort of way... especially when you're impaired in that sort of way.