Sure, the tax revenue looked great, but it happened in a way that caused great human suffering by making occupancy in the city zero sum, and awarding it to only those who had the most money to pay. That's not how it had to be, and choosing a zero-sum economic system rather than positive sum was foolish, and only meant to appease those with conservative views on construction. And by basing tax revenues on the business cycle, SF is now at such great risk, with huge social spending needed to repair the damage it inflicted with this unnecessary zero-sum system.
Sadly, those who will be hurt the most by a potential downturn are not those who benefited by setting up a bad system. A downturn will help nearly no one, and cause great suffering. I feel a little sick in my stomach when I hear some hoping for a downturn, either as a chance for them to finally buy real estate, or as a chance for S.F. to be made great again by returning to some imagined past. Both of these are very unlikely, especially the second.