I think both drag performers and Broadway actors have the perfect skill set for reading books to kids. It’s like the difference between reading the lyrics to a song and hearing a musician sing it, regardless of whether they’re a country singer or an opera singer or a movie music composer. An actor, whether Broadway or not, would know exactly when to pause to create dramatic tension, be able to give characters their own unique voices or personalities, etc. And the fantastical, exaggerated costumes of drag I imagine just make it all the more exciting for the kids.

As for how drag performers reading books to kids started, I have no idea, but somebody else said it started from people volunteering to read books to kids at local libraries, and the LGBT community got into helping out in that way, which led to drag performers doing it. And that makes sense to me. The LGBT community seems to be heavily made up of people who want to support their communities. Probably because they’ve often had to band together and create their own.