I guess this is a matter of opinion. I've taken a number of hinge pins out of British guns and in no case were they particularly hard steel and all showed wear. The obvious reason that H&H referred Vol to Eversole is because it's too time consuming to fit a new pin and clients balk at the cost. With the advent of Tig and laser welding just refacing the hook and dressing down to fit the existing pin has become the "new" way. But it's not the best way. In a perfect world the surfaces of hook and pin would both be finished to a high polish and mate perfectly across the full width. The only way to get there is to fit a new pin and take the time making sure that the bearing surfaces of the pin fit tightly into the frame. That means the circumference of the pin head must fit tight and the thread have zero slop, in short it must be as near a perfect fit as possible. And you still have to make it a few thousands over to allow for final polishing. All this before you even start on the hook. A person picking up a new shotgun doesn't have a clue how many cycles of opening, closing and firing it will take before getting loose. It depends on the quality of unseen work. But when it does get loose, as surely it will, just getting the hook resurfaced and refitting it to a worn pin may be perfectly acceptable, most particularly if it's not your gun. But just because H&H says"do it" doesn't mean that's the best way to do it.
nial
