No the Blue Shell adds MORE skill to it, strategy. This is my conclusion after playing thousands of MKDS matches and learning not to suck. If you're in first and a blue shell comes at you, DROP BACK AND HIT THE OTHER PLAYERS WITH THE EXPLOSION. If the other players are too far back, then you'll just be equal after the explosion, and if you really DID deserve to be in first, you'll have no trouble getting back there. It's so EASY to manage blue shell attacks in MKDS because you can SEE OTHER PLAYERS ITEMS. Plus, with Mario Kart (especially now with 12 players) you don't HAVE to win every race. You could win a MK Wii championship coming in 3rd or 4th every race.
Play the game, don't let it play you.