Except for the fact that the computers on the Apollo spacecraft used the metric system internally, then converted it for display so the astronauts could read it. Considering how precious every bit of processing power was on those computers, it makes that statement even more ridiculous. And yeah, I hear that silly statement made often here in the US. Those that use that ignorant meme tend to also use the phrase "measure twice, cut onc...shit" because it's a pain in the ass to subdivide.