You did not answer the question which was not if there ever was any case at all, but how many. An individual example is useless when the question is about if something works at (even minor) scale.
> An individual example is useless when the question is about if something works at (even minor) scale
That is incorrect. The plural of anecdote is data.
Someone wins the lottery every week. What are the odds of winning the lottery? Is playing the lottery a good strategy to make money?
"Usain bolt won the olypmic gold medal many times (n=8).
If winning the gold medal was so rare, what are the odds that people like Usain Bolt exist?"