Easy there, cowboy.
Some of the riders involved in crashes in descents the past few years, were very experienced like Gilbert and Bakelants.
Kruijswijk crashed at age 28 in similar circumstances (pressure by Nibali)
Fuglsang was just lucky in L-B-L last year.
I'd say that experience in Cyclocross or MTB are the main factors to reduce the chance of this kind of crashes.
Age? Not so much.
Dont bother, let him talk to himself from now on.