There's no hypocrisy here. I'd love to see Rob develop, and firmly believe he'll be a starter for us for a long time. But there's no reason why this can't be done with a solid vet on the roster. An OT configuration with two veterans, two young players, and some low round developmental players from big schools is the best way to solve the current tackle problem for a team that's expecting playoffs.
That said, I don't want to gamble the improvement of our tackle play for next year on whether or not Rob does what we expect him to. If he shows comparable ability with more upside than any competition, he'll get his playing time. It might even make him work harder. If not, Parcells can always rotate tackles if he wants to see what he's got; he does it with C, of all things.
As for the draft, I'd like to see a trade down for an ILB or BPA in round 1. I'd be exstatic with Latui in round 2, and would expect some manuevering to get a tackle or two in rounds 5,6,7.