Cars/bikes etc don't have carbon footprints to manufacture? This is an idiotic comparison.
It's asinine. I might as well include the CO2 footprint of the wear on your shoes and pants from walking.
And scooters would still be found wanting. Pants and shoes can survive a few months of daily wear. With proper care, even cheapo stuff from Target/Walmart can last for years.
Right now, Bird and its competitors are struggling to get six months of lifespan out of scooters used an average of just 3 times a day.