If you're looking for the rate at which something happens, for the purpose of predicting events in the future, you need to see the event occur many times before you can fairly estimate it's rate. That's what my example means.

I'm not defending Uber here- I'm defending statistics!

With more data, we may discover that Uber cars are 100X worse, not just 25X. Or we may discover they're better. But we don't have the statistical power to make that estimate when we've only seen the event happen once.