It might be expectation. Peter has been played by a woman for a "One Hundred, and Thirteen" years. It's just expected now. This may be why every "Pan" attempt with a boy rightfully in the role had flopped through the floor into the basement, and continued to the earth's core.
However eventually the right script the right backers the right art director the right cast, and most of all the Right BOY will happen. This could happen in a few years or in fifty, but it Will Happen.
I just pray to the G-ddess I'm still around to see it.