It's not as if cathedral designers did it themselves manually. They'd farm it out to legions of "biorobots", not all of whom did it solely for the love of God (not only did stonemasons like to feed their families, occasionally, though not that often, workers could even be prisoners of war). Obviously it was eventually done manually, with some animal effort, out of necessity, but I strongly doubt no computers, hydraulics, electrical power, carbide tips or pneumatics would have been used, had they been available.