Why can't car companies just focus on making their endless array of ungainly obese inefficient cookie cutter whales on wheels (crossovers, SUVs, trucks) instea

Why can't car companies just focus on making their endless array of ungainly obese inefficient cookie cutter whales on wheels (crossovers, SUVs, trucks) instead of actual cars anymore for some reason and leave the tech to tech companies that know how to write software?