Doctor Who is a show about a lead character who changes faces and heights and even accents, and the series today is quite different than it was when it premiered back in 1963.
He has evidently seen overwhelming support for the show as it prepares to go in a brand new direction, which would make sense.
According to Steven Moffat in a recent appearance at a San Diego Comic-Con panel (via Variety), all the buzz about controversy was actually much ado about nothing.
Jodie Whittaker’s casting is simply taking the show somewhere where it has never gone before, and surely the majority of true Who fans are excited to see something fresh.