If that difference in goal-setting is enough to flip the switch for someone who is thinking "ugh I just can't consistently get 10k steps", and they end up frustrated and giving up... to now being like "ok I'll just try to at least get 5-7k steps a day" then that person is likely ending up much healthier than someone who gave up.
If you already walk 10k / day, or have a comprehensive exercise program, you know this (very brief) article is not for you. Let it go.