That’s not an ‘emergency flasher’ button, it’s the hazards, and it’s for when you’re broken down or crashed, or (illegally) stack your home depot run 17 pallets high.

I’m a first responder (at least, used to be) and that button is known in the states as the ‘park wherever you want’ button and nothing else.

Fun fact, using the hazard indicators while moving on a public road can be a cited offense. But you have fun going wee-woo and playing pretend emergency man. Maybe lose the snappy attitude though, it’s indicative of your age and knowledge.