Can't believe the Creator made fun of his country's cuisine.
When you grow up with AMERICAN CULTURE advertisements everywhere, you get this ironic opinion of your own country's stuff. ¯\_(ツ)_/¯ Smetana is like sour cream I guess, but I never tasted anything labeled as "sour cream" when abroad, so no personal experience.
You can trust Poland with a lot of dairy products. Especially during hot season maślanka is amazing. Just don't ask us to make some good cheeses. I'm sure they're there... somewhere.