There are (a huge number of) roads with a 60mph limit (for cars) that cannot be negotiated at 60mph.
Every single driver that negotiates one of those roads has chosen a suitable speed, and your beloved speed limit has had zero effect.
And many others that aren’t safe at that speed in the wrong conditions, a bit like a wet rush hour in a 30 zone.
I don’t drive to the speed limit, I drive to what’s safe (for me and everyone else). Which is why I’m just as happy doing 25mph with a queue behind me as I am doing 120mph (when making ‘progress’ 🙂 ).