I feel this is a no-brainer and it's nice to have a meta study confirm it. I won't be surprised if we start seeing health insurance plans offer rebates or discounts to people who use them.
A few years ago I moved out of the suburbs and in to an inner city apartment. Decided to just get rid of my car and walk everywhere. I made no effort to actively exercise, but just went about my daily life. What surprised me is that since I went car free, my average heart rate has been constantly declining and my weight has as well. I don't follow any kind of diet and don't really do intensive exercise (until recently).
Just getting rid of my car and walking around massively improved my health in ways my apple watch can pick up.
Discovery (SA) gives you rewards points for activities, among them step counts: https://www.discovery.co.za/vitality/active-rewards-goals