I'd say you're far more likely to crash in a crit, hour for hour, than the open road. But training 400-800 hours per year and racing 12 or even 100, it's a bit more even.

I've been hit by cars a few times and crashed in races a few times, and feel more in danger on open roads. Crazy drivers get angry and threaten you, speed by within 12" to piss you off, and getting hit by thousands of pounds of steel isn't the same as rubbing wheels and rolling on the pavement.

I've done hundreds of races and only seen a few broken bones or broken carbon. The worst danger is probably going wide in a turn and hitting a sign post.