True, he wasn't - though when called upon to do so, he did it with aplomb. Brother Jack, on the other hand, headed the ball zillions of times per game, as do many defenders.
Funny. My old man used to play football in his home town of Maesteg as a youth and later played for his Divisional Team. He lost his hair at a very early age and Mum swore it was down to heading the ball. He died with Alzheimers disease.