For the same reason I think airport security checkers ought to be randomly required to board airplanes they've just "inspected". It concentrates the mind.
This guy wants to ignore safety recommendations. Okay Mr Griffin, if you think it's safe enough for others, welcome aboard.
Yeah, I get your point. But his point is not to be unsafe, per se, but rather that risk is going to be involved here, and we may just be trying for a perfection we'll never reach.