I'm not quite sure what "dangerously fast" is.
One can have a speedy ride while being safe around traffic, intersections, corners, and road debris on corners.
I haven't raced since I was a kid. Perhaps if I return to racing, it would be as a TT. Those race pileups don't look fun for a 50+ rider, and since I never raced as an adult, I probably don't have the skills to be safe in a group.