This is why Jodie Whittaker believes Doctor Who is in a genre of its own, and that the term “science-fiction” is too limiting.
Sure, Doctor Who has a good deal of aliens and time-travel, but as Jodie Whittaker points out, the program is largely about how the Doctor reacts to each situation and the world around her.
For that reason, Whittaker appears to be saying the show is one viewers who may not even like sci-fi can enjoy, provided they can see the series the way she does.