Walking is sort of refurbishment for your body, isn't it? Yes, it is.
Do not look down on these refurbished Fitbits! They also bettered themselves. They also had a bunch of numbers to move them from "broken" to "renewed." They also struggled until they made it back to being the Fitbit they wanted to be. That's why they're going to be so hard on you. Because they've been there. Because they've been there.