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.
Excellent, the punchline is sorted, now we just need the rest of the joke.