A lot of the men who he says are examples of high test are gay men!

Lots of cardio increases cortisol, a stress hormone, which negatively affects your immune system, making you more susceptible to disease, cancers, colds, etc.
Over-training does the same, which is why over-trained people often get sick.
A diet high in saturated fats and cholesterol increases test.
Eating soy, seed oils, sugars, and processed foods lowers test.
Since eating saturated fat and cholesterol is frowned upon by doctors is it any wonder men's test levels have declined in the West.