The reception for the ceremonial procession of a prince in Japan is second only to the grand ceremonies for the Emperor.
Of course, there are even higher levels of ceremony, but those are reserved for receiving heads of state from other countries.
Is there an issue with treating a demigod to the protocol used for visiting foreign heads of state? Certainly not. In smaller nations where demigods have appeared, they may even use royal ceremonies to receive a demigod.
However, a demigod is inherently a symbol of a nation's foundational power. For countries that can sustain the presence of demigods over the long term, treating their own demigods with the protocol reserved for foreign heads of state creates an inherent sense of alienation—almost as if the demigods belonged to another country.
