How can we be sure the Goliath thing really is a scribal error? There were at least a handful of these big guys. Goliath was their champion. His untimely and humiliating demise was a major blow. I can see his people "bestowing" the mantle of "Goliath" on his not so little brother Lahmi. Please don't take this wrong. It's not an assertion, just a thought. One should explore all reasonable possibilities so as not to jump to a wrong conclusion.
Yes, you are free to make up whatever rationalization suits you. Just remember, what is in the bible is in the bible and what is not in the bible is not in the bible.