If you could move an entire country from being car dependent to being largely car free, by pushing rapid urbanisation and transit and you put 20 car drivers onto a train or a bus, then we're starting to talk about measures that actually have some effect.
Or if we eliminate meat consumption altogether rather than promising people magic lab meat every five years, that would have an effect. Or if we put some significant money into a manhattan project for carbon capture, that at least gives us a statistical shot.
But buying a tesla or a linen bag at the supermarket or paying 50 cents for a biodegradable cup at starbucks isn't saving the planet, it's the modern version of paying the catholic church for absolution.
And in the long and infamous history of bad references to fallacies, this isn't one either. If you need to go from 100 to 10 and you're spending billions on something that gets you from 100 to 99.9 you're wasting time and energy that you don't have.