Of course people in other countries do this, but anecdotally it does seem to be more common in the US. I think it's something to do with the American dream.
I have lived in France and Germany and 95+% of the articles I have seen that follow this exact pattern to use as selling argument for $SomeTechnique$ the exact number of millions or billions someone made using $SomeTechnique$ were from the US.
Perhaps you don't pay attention. It striked me because I couldn't care less about the lives of billionaires. People laugh at the 9 years old girl who wants to become Madonna but that dream is no more irrealistic and is IMHO less stupid than becoming Elon Musk.
And no, I'm not gonna make 9 babies. If I have a child one day I want to do half of the parenting.
The spirit of capitalism comes from the US and has a religious background.
Nowadays, many countries have a strong US cultural influence, no shit.
I wish I was smart enough to make this up, but it all comes from this very famous book which summary I provided.
Maybe reading books is not your thing, but I find it interesting.