I think they are meant for people to believe they do something so they’ll feel better and wait. I used to walk a lot and encounter lots of crosswalk with buttons and I got used to how fast I should go in order to catch green every time and I could predict when the next crosswalk was going to turn green. If they truly worked then they should have been out of sync. I never pushed the buttons and I saw the light turning green even though no one pushed the button, if the buttons worked then why would the light turn green?
I also asked gemini about this and he said I’m not going insane, strange because I never mentioned if I was insane or not, but good to know I’m not.
Maybe some buttons work and other don’t depending on where it is?
Every municipality is different.
Some do nothing except beep and vibrate for visually impaired people. That style, try holding it down for 3 seconds. When you get the walk sign you should get audio and tactile feedback.
Some lights will not change to walk unless you press the button. Some only exhibit the behaviour at night.
Here’s a video of Nic Laporte studying them in Vancouver, BC, and here we have Bike ones in addition to standard pedestrian ones.