So many people just can't understand this. In dense city streets your journey times are usually decided by how long you spend waiting in queues and barely affected at all by your top speed. Which is why you can get around a city by bike faster than by car, even though few transportation riders cruise at much more than ~16mph/25kph on the flat.
I used to think that people just hadn't thought this through and realized it, but I've had a few online discussions where it's clear some people are just flat out incapable of understanding that when there's congestion, speeding to a traffic queue most often just means a longer wait in the queue, not a shorter journey time.
Not to mention an emissions decline means we're still making things worse, but not quite so quickly.
Obviously the path to making things better would have to pass through here, but just as people thinking electric cars are a solution rather than more of the problem, the delusion that this is winning is also part of the problem.