That sounds plausible, but then why are robocalls not a problem in Europe?

I have two EU numbers and have never gotten a robocall on either of them. I have never heard of anyone getting a robocall in Europe, and while that might just be anecdata I think I would have heard something after two decades, especially in privacy-minded Germany.

When I get off the plane in San Francisco and activate my American SIM card, I usually have my first robocall before I get my first beer. And my mother gets so many on her land line, she always screens her calls.

What is Europe doing right here that America is doing wrong?