Decades of deaths in activities like backcountry skiing staying relatively flat while the numbers of people doing those activities exploding would go directly against your assertion that people are more reckless and stupid in the social media age than they were in the past.

If things like the Keyhole route are outside of your risk tolerance, that's a perfectly valid and rational decision. I'd encourage you not to do them. That doesn't mean no one else should be allowed to take risks you don't.

There are a ton of places in the Western US that are more than 20 miles from a road with very few restrictions on camping.