Thank goodness we have another helmet thread; there just aren't enough of them. OP, start with something a little more deadly, IE

Why do people:
Smoke
Over eat
Use drugs
Refuse to wear seat belts
Have random unprotected sex

The list goes on and on. They choose to do what they want and you choose to do things as you see fit, one doesn't effect the other. Do yourself a favor and identify why you crashed and learn to avoid or manage that type of risk better in the future.