Statistically and logically, there is a much higher chance for success for Buch and Dice-K than Joba and Hughes, and the main reason is Dice-K, who has proven he can pitch an entire season effectively, and last year, Buch showed better command and stamina than Joba as a starter, whose endurance is in question. As for Hughes, he wasn't even fully stretched out to be a starter. It's not about underestimating abilities, it's about who has less question marks when it comes to the possibility of getting positive results, and the answer is clearly Bucholz and Dice-K.
You're taking things out of context. I never spoke of a guaranteed decline, i spoke about their ages because natural regression is impossible to stop, and some decline from either or both of them could help even the odds, and it was all just to bring me to the point that Jacko speaks of "Father Time" for Red Sox players on a constant basis, but Yankee players are not impervious to it, so why does he never take it into account?
Some objectivity is required on both of the subjects i have touched on this post.