If everyone at your local YMCA had to train like a Navy SEAL, most of them would be in the hospital before dinnertime.
I Was Wrong - The 'Greatest in the World Fallacy' and How I Made It
Charles Chu

Of course that would be true if they are all-of-a-sudden thrown into such training. But if they are allowed to ramp up to that level of training over many months, I think you’d be very surprised at the high percentage of them which successfully complete the training!