Why Already? Just Why?

Why don't we double other letters? What makes "U" so special that it gets its own space, waits a letter, then doubles itself and pretends to be an entirely different letter? Technically speaking, the "Double U" looks more like two "V's." Really! What does this look like to you: W? Does it look like "UU" or like "VV?" Are we prejudice against the letter "V?" Does "U" get special status because it is a vowel? If so, why no "Double A" or "Double I?" OK, AA is Alcoholics Anonymous and a Double I is a bi-clops, but you get the point! There are not 26 letters, there are 25 with one doubled! Get it right!