Your absolutism is a bit silly. I don't think the Imperial system is good for anything beyond construction or cooking, but there's a reason it excels those areas. And it's exactly because it's more usable by humans in certain contexts (like construction or cooking). 1/3 of a meter should not be an irrational number - how is that "optimized for humans"?
A scalable system that shares the divisibility of the foot would certainly trump both systems.
A scalable system that shares the divisibility of the foot would certainly trump both systems.