Seasoning in regards to cast iron has nothing to do with taste. It's a polymerized layer of oils that acts as a nonstick coating. The process of seasoning cast iron is to lightly coat it in oil and heat that oil to smoke point and repeat that process several times.
That's not the point of seasoning, it's to prevent the pans surface from sticking. The reason people say food doesn't taste the same if the pan isn't seasoned is because it sticks and cooks wrong.