I tend to agree with you, but Seattle is in a state with 0% income tax, so just because the city’s taxes are rising doesn’t mean they’re net higher than other large cities.
It seems like this thread proved the opposite of the point you were trying to make -- that Americans are indeed migrating to states with no state income tax?
Texas is not friendly to small business. Small businesses require customers. Texas has a lot of poor people, who typically don't shop. Seattle has a lot of well off people with disposable income. If there are no customers, low taxes don't mean much.