Oh yeah, they all will be shocked to discover that they had XY chromosomes, surely nobody in their country could have been aware of it, they never ever do health checks on athletes and as we know, DSDs are basically asymptomatic. All healthy women who went through normal female puberty might secretly harbor a Y chromosome.
I actually think Tony is right here, but for the wrong reasons. Back when they used to do screening of female athletes to qualify for the the Olympics in the late 80s and 90s, there would be like a dozen people eliminated from the female category every four years. The rate was something ridiculous like 1 in 400 female athletes.
But this was because of things Tony's cult won't let him acknowledge:
1) The Olympics is worldwide, and there are a bunch of shithole countries with such poor medical care that it's plausible that an XY human would be classified as "female" just because they were born with vaguely female-looking genitals and were never taken to a doctor since then (the lack of a period and other symptoms being blamed on witchcraft). This was probably even more common a few decades ago.
2) In many cases where the "women" claimed to be shocked and devastated after their "surprise" test revealing XY, they were simply lying. See Imane Khalif. They had probably already been diagnosed with some sort of DSD, but thought they could get away with cheating and tried to save face afterwards by saying they had no idea.
3) Most importantly: "women" with Y chromosomes will be heavily overrepresented in elite global sporting competitions
because the Y chromosome confers an advantage when it comes to sports.
So it's not that millions of women everywhere are walking around with unknown Y chromosomes, it's that the tiny number of people with relevant DSDs will get funnelled into the group of women who are competing in sports at an elite level.
It's like if you had a worldwide autism competition, and beforehand you checked each competitor's devices to find out if they were secretly a user of Kiwifarms. If you got a 90% positive rate, it doesn't mean that you should expect a 90% Kiwifarms use rate in the general population, it just means that Kiwifarms users are more likely to possess high levels of autism.
But you can only accept this obvious point if you first admit that the Y chromosome gives you a physical sporting advantage, which Tony cannot. So, Tony the supergenius again ends up looking like a retard who doesn't understand basic statistics.