I dunno if mere traffic counts as a reason to consider cycling unsafe.
Tell that to Dallas, TX, where the traffic AIMED for me on more than a handful of occasions.
I love my bike, but I'm skittish around it now, since, well, yeah. Having to dodge blood-crazed motorists is NOT a good time.
All that I say applies only to myself. You author your own actions and choices. I cannot and will not be responsible for you, nor are you for me, regardless of situation or circumstance.