Yeah, if a pilot flies to the limit of what is allowed by the law on a constant basis, he/she will be a walking zombie. Or maybe I should say a walking, pissed-off zombie, since they'll also have no personal life. Companies of course, don't know this - sometimes the legal limit is treated as the target, which is a mistake. But by putting it in black and white, companies are invited to abuse it, with no recourse available to the crew.