Elon Musk laid out why it's so hard to make Optimus a reality

A prototype of Tesla's Optimus robot. CFOTO/Future Publishing via Getty Images Elon Musk detailed just how tough it will be to make Optimus a reality during Tesla's earnings call. He said it will be the hardest product to manufacture at scale in Tesla's history. Musk, known for setting overly ambitious timelines, said he wanted to "calibrate people correctly." Elon Musk is discovering just how difficult it is to build a robot that can walk, talk, and think like a human. The Tesla CEO said…