I think it's funny. It also shows how indecipherable growled lyrics are. If I didn't already know the words to this song I'd have no idea what the singer was saying.
And I hate Mary Poppins, the movie. I didn't like it as a kid and I hate it as an adult. Never was a big fan of musicals.
_________________
"The cat is the most ruthless, most terrifying of animals." - Spock in the "Catspaw" episode of ToS Season 2.