> it means the Theory Initiative will have a target that will never move to aim for when working out their final SM prediction
Sure, and this breaks some level of independence between this two workstreams -- it seems unlikely that the Theory Initiative will publish a number that diverges further from the experimental side.
But on the other hand, we're going to be in a world where there are two theoretical estimates, one based partially on empirical methods and one based on lattice methods, and these are going to diverge. So the obvious next task for the theory group is to (a) explain why these diverge and (b) explain why the lattice method is the more accurate one. Which likely will lead to more work for the experimentalists to explain why the inputs to the empirical methods didn't generalize.
Plenty to still learn here.