It was a Joke. But i agree with you to some extend that most of these guys from other sports tend to cause quite some crashes.I know others can be crash-prone, too.
On the other hand it seems to me that riders coming from other disciplines such as mountainbiking and cross seems to have on average way more handling skills then traditional road cyclists.
anyway, agree that these guys that start cycling at an older age seem to add some additional risks to cycling. But it still makes for some interesting stories haha.