If there wasn't the chance of gold-chevron revolts happening you could destroy the buildings, occupy/ enslave the population and then reconquer and repeat. (OK each go gets you less, but it would still be a nice little earner.). Normally I only destroy buildings when a) they serve no purpose e.g. military barracks with scythians b) when you need to reduce the cultural penalty and c) when I have no chance to hold onto the city.
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