Great set-up - great find!
But the attendants thing is by design for this installation, and from a service-oriented culture where economics and competitive forces enable it. Of course the shortage of land in Japan also drives creative solutions like this where flying the pumps makes more sense than letting them take up valuable floor-space.
Not saying the same competitive service-driven forces could not apply in those US states, but being enforced by statute doesn’t even let anyone find out. Self-serve (make the customer do the work and cut the costs/price to compete) has long been the dominant force, so this sort of regulation does come over as pure job protection luddism rather than a safety measure, given it has been proven safe enough elsewhere.
