Differing of opinions? the way I see it rock is rock, quarried or not it is all outdoor climbing and as far as I have read bolting ethics state that bolts should not be placed if decent natural protection is available. Rough translation but feel free to read the ethics yourself. Brett seemed to think the natural pro would be possible, and Jim’s post stated that he did not know the rock was friable when bolted so really no reason not to use the pro. Maybe the rock was ok and was damaged by hammering in the carrot?
