Sure NYC has certain desirable aspects. Seattle has a different set (e.g. way better nature). The point isn’t to compare the cities to find the absolute best. Rather, the question is whether or not the benefits of certain cities or worth the cost. For high earners, the cost of living in NYC is hundreds of thousands or even millions of dollars per year. For some percentage of people that cost is simply not worth it and they move. To claim people don’t move because of taxes is to deny basic economics.