I'd lie. I don't want to get singled out for home abuse or bullies. There are people that have it worse. And having to talk to people that are powerless to remove bullies is a huge mental drain.
He may have been referring to research that suggests girls generally cope better with the American school system's structure and approach than boys:
https://www.theatlantic.com/sexes/archive/2013/06/stop-penal...
But then the bullying never really goes away for either gender. It's disguised and legitimised as various commercial, professional, political, and social activities, but the motivations are similar - just more covert.
This is like saying "I had no idea how severely boys beat or insult each other". It is absolutely true that such problem exists among boys. But you still have a lot of groups where boys don't beat each other.
According to other research boys are coping mentally better with COVID than girls.
I purposefully shown some online games to my daughters so they can socialize with friends. But looking around, it was quite exceptional move for parent of girls. They had more schoolmate boys playing with them although they normally socialize more with girls. And some of those girls were the ones I told the parents about the option. I did not asked single boy to join, they were already gaming.