I think you have
I think you have misunderstood something about the financial data.
You write: "s a company, Tesla is the only automaker ever to make a profit building electric cars, posting more than $900 million of profit in the last quarter of 2019 (though it has yet to post a profit for an entire year, and over its lifetime has still bled red ink overall. "
Tesla has never ever had a profitable fiscal year. Never ever.
Tesla has not yet releashed financial data for Q4 2019, so you must mean Q3
Tesla did post a profit in Q3, but less than 1/6th of what you wrote.
Tesla is ~$900M in the red YTD (including Q3)
Tesla will not be profitable this year either.