Caporegime
Yep. There is no canon at all. It's fudge after fudge after fudge. A woman doctor? Who cares. That's the least of their worries. It's been rubbish since Tennant finished.With Bond I agree.
With Doctor Who, writers have been playing fast and loose with the nature of the show for years. What little canon exists is broken on a whim. The characters have chronic amnesia, with little in the way of coherent story arcs.
The show is basically nonsense. Entertaining nonsense. I don't think casting a woman to the role is uncharacteristic TBH.