It is not just to show our muscle, biceps or triceps, but to show the muscle of Steem Blockchain.

This is exactly it
Will 7 pushups do anything on it's own... probably not
7 pushups over 77 days... it can get you into a habit and you can start levelling up as you go
7 pushups over 77 days with 77++ people doing it.... that's where the magic starts...
Maybe it will get us to the moon, maybe it just Phase 1 of getting us to the moon... all said and done... we are doing something and that counts ;)
Glad to be on this journey with you <33