First, let's not forget that jaywalking is one of those "crimes" that is used as a pretense by police to harass people, usually young people and people of color. Second, as a veteran jaywalker, my rule of thumb is that if a car has to hit their breaks even a little, or otherwise alter their trajectory, you're doing it wrong. The goal should be smooth movement for all. Third, just because someone else is jaywalking do…
There's also waiting 1-2 minutes for green light on a pedestrian semaphore while the street is entirely empty of cars. If no cops are in sight I definitely cross the street. Usually one or two people get encouraged and also cross but there's always the sticklers who would wait the end of the world if not given the green light.
That's the way it works in Belgium: you wait sorry-out-of-luck for two minutes. Needless to say I've been raised (by myself) a jaywalker.. In neighboring Luxembourg you have the exact same traffic light, obviously built and sold by the very same company, looking identical except that the traffic light poles in Luxembourg have a button which pedestrian do press. And if there's no traffic, it becomes instantly green for the pedestrian. Actually even if there are cars, it'll very quickly turn green for pedestrians.
As a sidenote it is obviously safer to cross a street even though the signal is red for you while there are zero cars than to cross that same street when the signal is green for you and an incoming car is slowing down. I mean, I know, it's my right and the car should eventually stop. But I don't give a flying fuck about rights and fatality and rules if the car hits me.
I'll never stop jaywalking.