I don’t understand this line of thinking, but it’s surprisingly common. 

Don’t push things in a better direction until everyone else is too/if it doesn’t fix all the problems it’s not worth doing?

Creating individual examples is the ONLY way to change things. 

In time it will shift policy, public perception, create comps, works out the kinks and financing, and provide a proof of concept to attract capital and developers. 

Gotta start somewhere. Progress isn’t perfection—it’s just one step at a time, by passionate individuals and teams.