Hardened valve seats - do they really matter?

When it comes to cars and trucks (at least my own) and engine work I'm almost never "not" working on something from Mopar. The same machine shop mentioned above has told me more than once that Chrysler couldn't do a concentric valve seat if their lives depend on it. Almost every one he gets in is eccentric to start with.,. Not saying yours are cuz I can't see em from here but if there's that chance, then simply lapping them in won't help