Harsh thread. I try to not think about this stuff and just skate and push my self. Sometimes when you take a few slams, you don't give a shit anymore and you can go for almost anything that day. Actually I sometimes like competitions for that reason, you can't just throw your board, you need to go for it. I've done so many new things during competition runs, because I was too scared to do that just by myself.
In the end falling almost isn't painful at all if you know how to fall right, the most annoying thing is when your board flips in your ankle and in your legs.