Netflix Suggestions are Weird

Netflix tries to suggest movies that they think you will like based on what you've already liked. Makes sense. But the results are sometimes a bit weird.

Sometimes they're just pathetically obvious:

 

South Park: The Hits

Because you enjoyed: 

South Park: The Passion of the Jew  

South Park: The Imaginationland Trilogy

South Park

So, since you've enjoyed various episodes of South Park, we're going to go out on a limb here and suggest that you may also like these other episodes of South park!

Sometimes, they're kinda weird:

The West

Because you enjoyed: Jim Gaffigan: Beyond the Pale

Frasier

30 Rock

Oh, so you enjoy stand-up comedy and American sit-coms? Oh, I'll bet you'll love this Ken Burns documentary! It's hilarious! Oh, it isn't?

And sometimes they're just bizarre.

American Experience: The Great Famine  
Because you enjoyed: Archer
The Kids in the Hall

Um, what?
Maybe "The Great Famine" is some sort of comedy?

Well, Netflix describes it thusly:

This installment of "American Experience" sheds light on the devastating 1921 famine that left millions of Soviet Russians starving, a pandemic that prompted then-Secretary of Commerce Herbert Hoover to mobilize Americans into action. 

So how is my enjoyment of very silly comedies an indication that I would enjoy an historical show about a huge tragedy? 
If anyone has any insight, I would love to know what these suggestions are based on.