I worked for Uber about a decade ago. I was aware of the stories as they'd circulate internally. It's fine, until it isn't. Calling it hilarious is a lack of imagination or critical thinking at best.
They presumably know their wife better than you do, internet stranger. They did not hide that they were talking from their experience, and not from a published paper on Uber statistics.
My wife will not ride alone in Uber's because she's had one too many uncomfortable -> possibly dangerous situations.
This appears to be true for all of her friends as well.