If they get robbed theyd much rather their old iphone 7 be stolen than a brand new more valuable/expensive phone.

15 is too big and I don't like running with it on my arm. I wish I still had my old iPod Nano, not sure why Apple stopped producing those.

Unfortunately I no longer have a real iPod (I used to have a Nano back in 2007.) and my current iPhone 15 is kind of too big / annoying when attached to my arm while running, so this was the best solution I could come up with.