Because it's not what the Skins traded to move a few spots, or swap picks etc.
It's What did the skins TRADE to get RG3.
and the answer is 3 ones and a 2nd.
That's what will go in the history books, not 2 ones and a 2nd plus a swap of ones.
Um, the Skins don't have RGIII, and the didn't give up three 1sts and a 2nd. Here's an easy analogy for the See Spot Run crowd...
Excellent Quality Diamonds = $1000/carat
Lower Quality Diamonds = $200/carat
Les finds an excellent quality 10 carat diamond worth $10,000 dollars in a diamond mine. Bruce also finds an excellent quality diamond, however this one is about 8 carats and worth $8000. Bruce knows how rare that 10 carat diamond is and offers to trade Les his 8 carat diamond, plus some extra stuff, for Les' 10 carat stone. After negotiating, Les and Bruce come to an agreement. Bruce will send his excellent quality 8 carat diamond, plus the next two excellent quality diamonds he finds, and a lower quality diamond to Les in exchange for the 10 carat diamond. To make things simple, all diamonds involved must be at least 1 carat. Assuming the minimum possible value for each stone, Bruce is trading $10,200 worth of diamonds (One 8 carat excellent diamond $8000, two excellent future diamonds $1000 each, and one lower quality diamond $200) in exchange for Les' $10,000 excellent diamond. This would result in a net cost of $200 to acquire Les' diamond.
However, more than likely, Bruce will not find a small (minimum 1 carat) excellent diamond. Based on his success rate, Bruce is more likely to find two more excellent diamonds in the 4 to 7 carat range. Assuming one at the upper end and one at the lower end, that would be $7000 for the first one and $4000 for the second one. That would then make Bruce's offer $19,200 in diamonds in exchange for Les' $10,000 diamond, or a net cost of $9,200 to acquire the diamond.
The bottom line is this, Washington and St Louis are swapping picks...and the cost for Washington to swap that pick is two 1st's and 2nd. After the deal Washington still has a 1st round pick, the lose the 2nd round pick this year and the next two 1st round picks. It's 3 apples and one orange for 1 apple, or a net cost of 2 apples and an orange. It doesn't cost Washington 3 apples if they get an apple back. HTH.