This thread is quite old, but you can’t pry 120v 60hz off my cold dead hands, also can’t pry 240v split phase 60hz off of my cold dead hands as well.
You can discuss and argue until you are blue in the face, but 120v /240v split phase power will always be more safe and flexible compared to what is being used around the world.
Higher voltages simply encourages more electricity consumption, also increases the chances of getting electrocuted as well since higher voltages carry more amps and current.