How hard is it for Google to figure out that The Onion is a satire site? They've had over 20 years to figure it out. The Onion aite also says "The Onion is not

How hard is it for Google to figure out that The Onion is a satire site? They've had over 20 years to figure it out. The Onion aite also says "The Onion is not intended for readers under 18 years of age." so Google shouldn't be showing it when Safe Search is enabled.