My friend Mayrav’s rabbi explains why in this very smart piece at the Jewish Journal:
Despite the mad and murderous blood libel, Jews abhor eating blood. The Bible is explicit in its prohibition against eating blood, and generations of salted meat are our culinary legacy. Jews overcook and oversalt. It is what we do. My mother, God bless her, thought meat underdone if it could not double as a club for batting practice. Moistness was the enemy.
More reasons here.
