Why is the concept of domestic tourist spots more difficult to define than that of international tourists?

For some reason, domestic tourists can't travel abroad for a certain period of time, or remind people who like to travel that domestic tourists should not travel temporarily because of special reasons and special circumstances. Tickets for any scenic spot in China are open to everyone in China. Except for special periods and special circumstances, such as scenic spots stipulated by the state, a place, a scenic spot and a special period can't be opened temporarily because of the epidemic, or a scenic spot in a place can't be opened temporarily because of the weather, special weather and special circumstances.