It's also fine to use tire chains when you're going through icy roads, but you have to drive much slower and should take them off when it isn't icy. It's about knowing the environment and conditions. Maybe some people don't need chains in that environment because they have winter tires (experience in our metaphor?). Sure, you can drive faster with chains on an icy road than you can without, but you still have to drive slow and be far more alert than you would when driving on a summer road. It is all about context.