Because the DW fandom is currently too stupid to understand even half of any given episode.
There is no discussion or even argument possible (and don't come to me with postpostpostmodern textual interpretation) - they just know too little of anything, life, the universe, history, literature, culture, people, anything - they are incapable of understanding it.
And they used to say DW has to be simple enough for the adults and complicated enough for the kids. *sigh*
It was never fun to be the only one to understand and agree with the teacher. Being right could never be enjoyed,
Maybe history will prove me and the other 2 percent right; but we know history is written by the victors - EVEN IF THEY DON'T KNOW IT