About 75% of criminals have been incarcerated multiple times, and most experts estimate that the average criminal commits approximately 10 crimes per year for which they are not apprehended.
If you are assaulted it will likely be at the hands of an experienced repeat offender. And since you're a nice guy, and you never hit first, you're likely to be punched, struck, stabbed or shot before you even start defending yourself.
Proposition A: We must practice fighting while hurt.
We are habitual, repeat offenders too. We do all kinds of things we know we shouldn't do. We skip training sessions, eat crap food, say stupid things, screw up at the office, drink too much, yell at the dog, etc. etc.
Proposition B: We must work on ourselves.
Repeat Offender: Martial Arts Training Involution #166
Complete Wrestling Conditioner #2 while impaired. Tuck one arm into your belt, tie a bandanna over one eye, put a pointy rock in one shoe, put on a brace that makes it impossible to bend one knee, or spread the contents of your gym bag across the training area and wrestle on that. It's amazing how annoying it is to work on the mat with a stick under your knee or a rubber gun in the small of your back. You can find instructions for Wrestling Conditioner #2 in Cabal Fang: Complete Study Guide from Querent to Elder or here.
Self-evaluate. What are you doing to get better in mind, body and spirit? What's your plan? Is it working? If you don't have a plan, or if the current one isn't working, try The Hourglass Way -- available on Amazon, B&N, iTunes, Smashwords, and everywhere e-books are sold.