Put me in the bolts should not be on an anchor... camp. TO be fair, those don't seem like they would affect holding if they sheered.
BUT... you are introducing a LOT of variables.
They are strong IF they are of high Quality
IF the vendor doesn't switch them out on you
IF you check them for corrosion
IF they never see a side load
As to your other points, no, my rig is not on bolted chainplates. My Chainplates are 1/2" Steel that is integrally Welded to the hull