Yes, but how do you get to breakeven? By reinvesting all your profits. High capex and no taxes because you don't have any income. And you can still raise money by issuing stock, which goes up in line with your FCF. You maximize growth at 0 profit and this also maximizes shareholder value.
So it sounds like you agree that they were "never profitable because they prioritized growth"? I'm not saying that's a bad thing; I think that ones of the things Bezos did right, and very much in contradiction to standard business dogma. I'