Yeah. If the 18 year old kid thinks UCLA will be a better fit for him football wise, then he should do it. If he prefers LA to MHK, then by God, go to school in LA. If he prefers the quality education he'll get at UCLA compared to K-State, then go spread your wings kiddo. He didn't sign his life away to us. Like MIR said, he doesn't owe us anything.
Is decommitting this late in the game a shitty thing for an 18 year old to do? Nah. It sort of sucks for K-State, but K-State will be fine. If this kid prefers to go to school at UCLA today or 10 months from now or 2 years from now, he should definitely go to UCLA. Sacrificing his happiness for the sake of some pledge he made to LHC Bill Snyder to play football at Kansas State is worse than the alternative.