I totally understand your logic, however, the ones you put in will corrode and the other bits will need to be refreshed (ideally) so part of my reasoning was I'd rather just replace them all more often and in oem fashion for much less $ than try to stretch the time on the whole system just because one part 'might' last a lot longer. (note that if any petroleum products get on those, it starts to eat away at them)
As for the hardware, I was lucky to have all my bolts be reusable (if i'd needed to but i replaced w new) except for one at the upper rear front i think.
Anyway, while not forged aluminum or even nicer steel, these are not "***" metal. They are stamped parts and welded. When I compare to my bmw and audi it's amazing how much higher quality the German engineering was.
Look under a Mercedes G wagon and you might just cry with envy