Citation needed
The only thing vague is the precise etiology. However, when it comes to legalizing irreversibly blanketing the planet in poisons, the onus should be on proving they are not the culprit, not the inverse.
'The average levels of the male hormone dropped by 1 percent a year, Dr. Thomas Travison and colleagues from the New England Research Institutes in Watertown, Massachusetts, found. This means that, for example, a 65-year-old man in 2002 would have testosterone levels 15 percent lower than those of a 65-year-old in 1987.'
'Research carried out on Finnish and Danish populations has shown the same trend [1,6]. And even more recently, a large-scale study of Israeli men has shown how average testosterone levels have dropped between 2006 and 2019 [7] — by over 10% across almost every age category. '
'Testosterone deficiency has a prevalence of 10%-40% among adult males, and 20% among AYA men aged 15-39 years, he added.'
b) Both of those are taking drops over a certain period and then you're extrapolating back to my great grandad and assuming certain results, which is a bit tenuous. No to mention also assuming the cause.
Quite a long way away from a "non-controversial established fact."
Truth is stranger than fiction: it would have been more accurate for him to say "they're turning the frogs trans".