How is the calculator ignoring this fact? If you think that increasing globalness will cause home price growth to be higher than inflation/rent growth, you can modify that parameter.
In San Francisco, owning is incredibly expensive. But so is renting an equivalent piece of property. So I'm not grasping why the options are limited to rent or "move away". (aside from exceptions such as renting under rent control)
(Or alternatively, you don't yet have enough saved for a down payment. In that case, wait a few years and run this calculation again. If you still won't have enough money in a few years, your rent is too high for your income)