Tesla Inc. CEO Elon Musk on Wednesday said the electric vehicle company’s operating expense is “embarrassingly high.” What Happened The billionaire entrepreneur was reacting to a Twitter post that compared Tesla’s first-quarter operating expenses with that of Rivian Automotive Inc.’s from its fourth quarter. Q1 2022 Operating Expenses @elonmusk Tesla — $1.9 billion Rivian — $2.1 billion — Whole Mars…