I think it's part of the Doctor Who cycle that people tune in at the start when there's a new Doctor to see if they like it. People would even say that the beauty of the show is that if you don't like the way it is now just wait until the next Doctor and it will feel different.

I don't understand why anyone would watch this iteration for more than a couple minutes, but I think a lot of normies are naïve enough to "give it a couple episodes."