You're right.
In most sports you cannot strike the face. Also the groin, spine and a few other vital points.
But I'm a stick jock. I hit people with short blunt objects. I suck at UFC stuff as they make me leave my sticks outside the cage. I do pretty ok at padded stick sparring, but on the street your balls, etc are a prime target. I also aint pulling my shot on the street....on the mat I like to walk out unharmed, and feel it's good to let my partner do the same.
I've sparred kenpo people who pull their shots and only target the chest, as that's all they are allowed to train against. I've been put through hell by other kenpoists who train harder and more 'real'. I've chased a TKD blackbelt off the mats, and had a TKD green belt knock me on my ***. I've done padded stick tap-tap point fighting, which ended with a bruised throat from a brutal takedown and punio choke. It's not the art, it's how you train. "Real Deal" schools are going to be few and far between. The average Karate-Mon doesn't want little Tommy getting hurt, thinks belts are important, and gushes about trophies the size of the national debt. The schools cater to the consumer otherwise they go under. That whole mall rent or main street is pricey. Not everyone is comfortable going down the dirt road, past the burned out rusted Chevy, up the dark unlighted stairs to the dimmly lit warehouse dojo. (yes, thats a real description of a real school, and they kick some serious *** there)
You're right. Sport is not Art. Neither are Combat.
Sport fighting != Self Defense != Combat != Art != Science
There is overlap, but no, they aren't the same.
What you train, depends entirely on how you train what you train.
Take Royce Gracie, limit his targets, limit his strikes, limit his techniques, and make him pull his shots, and you have, point fighting for rugrats. But it's still Royce.
Take PeeWee Herman, give him a stick, a few extra Red Bulls, and tell him "go to town" and you got a skinny, gangly killer.
Kung Fu, Karate, Ninjas, BBJ, TKD, etc. All went through their fad, cool stage. The TKD schools just market better.
Got a better art? Market it better.