I know its hard, and I know its in your thoughts running around, and accidents like these makes you think about giving up motorcycling everyone deals with bad stuff like this in different ways.
The best advise I can give you to make your life alit better and smoother is, don't waste time dwelling on bad news or things that we as humans cant control, almost everything we try to control is simply a matter of balancing 2 bowling balls on top of each other. Its hard and always takes attention to make sure its all holding correct in this balancing act we call LIFE.
We all know we ar;nt here forever, we are mortal and we get hurt, it can happen in a car, on a bike, falling off a ladder, or even crossing the street. Our bodies are soft and well they don't take damage to well. we all know that.
Remember to think about the positive things and don't lets matters we cant control over run out thoughts and get into how we live ourlifes, if anything learn from everything you can to take advantage to help yourself get threw life alittle bit more easier then before, no matter how old anyone is, we are always learning new things and learning from the past.
Be positive, be happy, and for those that you help in anyway to a person in need, show support in a positive way and don't let the emotion of what if it was peak its way into there. Its doesnt help no one, be strong for that person and so on.
I know I question myself even at times, I am sure we all do.
All I can say is do what makes you feel happy. Were only here for a short time might as well make the best out of it no matter what we do.
I know everyone probably already knows these things but...it helps to hear them from someone else at times.