NIMBYs have made all of us significantly poorer compared to what could have been. One economist estimated that GDP would be 30% higher without NIMBY evil. I think that is probably correct, though I suspect the real number could be as much as 50% larger if we’d crushed NIMBYs when we should have (during the 1970s). Preventing people from living where productive work and economic prosperity is located has all sorts of follow-on effects that are difficult to account for.
Areas with year-round good weather like San Diego and its immediate surroundings should probably have a population of 20+ million.