My first thought was "wait until they hear about Shakespeare". Literally every role filled by men, sometimes with the script explicitly calling for a man to play a female in full attire.
I'd also hate to see what policies they'll enact for their chorale program when performing historical hymns, where soprano parts specifically called for a male eunuch (castrato) to sing since females were not allowed to attend church services including choirs.
In my younger years I would have been absolutely vilified by these people. I'm probably vilified now, but I would've been then too. In all seriousness though, I cannot believe how far backwards we've gone in all this. I recognize that these thoughts and feelings have existed since before I was a kid but at least back then people seemed to have the decency to mind their own.
But to attack theatre of all things with this gender bullshit is attacking theatre itself. Crossdressing in theatre has existed for as long as theatre has existed. Cross-singing has existed for as long as singing has existed. If they're not teaching that stuff in their performing arts programs, they are denying young adults a quality education of the performing arts.