Actually the damage from chokes (assuming you're revived immediately which happens 99.99% of the time) only goes up to 5 (kids are choked out, revived, and back at judo in five minutes). And from locks it only goes to 20 - a broken bone/torn ligaments and tendons is pretty minor medically, most of us have several broken arms/limbs just from the normal process of growing up - climbing trees, jumping off garages and other such fun things. However head strikes does go to 100 (people have died from them), and even when it doesn't go to 100 (ie no death) the lifelong effects are in the 70-80 range.
Moreover, with strikes the damage is exponential, which is why sports like the NFL and NHL officially don't allow you back in play for several days after a concussion. If the first strike does 10 damage, a second one of the same intensity will do double or triple that amount, because an already concussed brain is much more susceptible because of swelling and internal bleeding.
Taking a single strike to the head often isn't too bad. Its the repeats before the brain has time to recover that do most of the damage.