Keyless ignition over complicates the solution to a simple problem. I’ve never liked them on those grounds alone, and I hadn’t even considered the risks for injury. Then again I’ve always felt that more bells and whistles on a car are just more opportunities for breakage and repairs.
I also really like the convenience they provide in being able to lock, unlock, and start my car without needing to take anything out of my pocket. If I can help it, I'll never buy another car without a keyless system.