What data do you have that building a high rise in San Francisco is financially risky? To the contrary cities like San Francisco is a gold mine for rent seeking

What data do you have that building a high rise in San Francisco is financially risky? To the contrary cities like San Francisco is a gold mine for rent seeking as there is such a pent up demand for housing after many decades of under building and the rents are so high that building a high rise is unlikely to carry much risk at all compared to other asset classes.