If defibrillators are that effective, making them accessible should be a bigger deal. Why are they so expensive after all this time? Maybe there could be an Em

If defibrillators are that effective, making them accessible should be a bigger deal. Why are they so expensive after all this time? Maybe there could be an Emergency App included in all phones with offline first aid info, a deadman switch that calls 911 if you let go of the button, and maps of the building you're in with are and fire escape plans, if they published one. Lots of businesses that could afford one still don't have them, why isn't there any legal requirement for million dollar profit places to have them?