"Fast Boats" vs "Slow Boats"
An A kite is not always faster than a symmetrical chute - overall, weight is the most important factor. All else equal the lighter the boat the faster it will go, and the faster it will depreciate and be subject to damage under normal wear and tear.
The best sailors in the world sail slower boats on a regular basis: Ben Ainslie - Lasers and Finns. Paul Foerster - Sunfish, Jeff and Amy Linton - a Flying Scot.
I have nothing against high dollar carbon fiber boats: However, the type of boat you sail will not make you a better sailor. Sailing an affordable long lasting boat against great sailors will win this race.