I have read this book recently, and while I agree all of them could have been prevented. The one thing I do take from reading accident analysis, is to yes, learn from others mistakes, but also to not allow myself to become complacent. A little "fear" I think is a good thing when doing activities such as scuba diving, flying an airplane etc. It keeps you aware of the dangers, so that you do not overlook the small but very important details. Complacency kills.
After my cave course, I found myself thinking before ow dives that, "ah well its only OW"! BAD ATTITUDE. I stopped myself before i got in the water to give myself a re evaluation. I treate all my dives like I am in a cave, going to the surface (bolting) is never an option, therefore it forces you to really plan for crap to hit the fan and be able to deal with all even at 40' in ow. Never break your rules you are NOT above the minor mistakes that these people may have made or major for that matter.
Now if it is real fear you are having, then you shouldn't be doing the dive to begin with. If you panic that will most definately kill you. Stay within your skill and comfort level.
just my 2 cents