This could be applied to every profession sport. Why would you seek to deny the athletes a chance to make money?It's the money that's ruined this once glorious sport. It should have remained firmly amateur.
This world record was done on a track which is known to be fast, with modern footwear technology and special LED lights which showed the WR pace on the floor. All this would help.
On the other hand 10 seconds is essentially almost half a second a lap every lap, which is a big time gap.
I am happy to believe it to be true until proved otherwise.