I gotta agree that the incoming batches are getting softer.
Changing lifestyles might be a factor. In the past kids used to
spend their free time playing in the hot sun; now they do so in
front of the computer in an air-conditioned environment.
Maybe not everyone is softer, but there is a general trend
towards softness.
One thing is for sure..... training standards have dropped over
the years.
That said, some enlistees do have medical problems which cannot
be detected by standard means, and that has nothing to do with a
softer lifestyle.
junk food and fast food may be the cause behind hidden health
problems such as heart diseases. and very often, it is these very
heart problems which are not easily detected in the medical
screenings.
e.g. a blocked minor cardial vessel may not be detected in the
resting ECG used in the medical screening. Resting ECG can
only detect the more obvious abnormalities. to increase precision,
stress ECG must be used to detect these "undetected" problems.
so i guess many people with genuine heart conditions slipped
through the screenings, and exert themselves as if they are
healthy individuals. so one fine day, they find themselves
bursting a heart vessel and die.