It is more or less inevitable that successful representation pushes will overcorrect and you get a situation like this. It doesn’t have to be badly intentioned, and it’ll work itself out as the market corrects itself. But my boys have plenty of books to read with male protagonists if they want them. Percy Jackson alone has carried one of my kids through a long stretch of recreational reading. There is, you know, centuries of literature for children available during which male protagonists were over represented.