Thing, yes but.
In the last 50 years the pool from which aircrew are drawn has more than doubled in size while the aircrew cadre has shrunk to about 15% of the 1950s figure.
Also there were many other medical problems then that are not applicable now. Mumps for instance prevented my BinL from applying but hearing loss for mumps is probably unheard of.
Then there was polio. Eradicated in most of the world now.
Asthmatics might be a problem but medical advances in other areas have redressed the balance. With health improvements, better education and a leaner more efficient military machine, the future is bright.
Can't believe I could write that last paragraph. Must get a job with Tone.