Yuyutsu, governments are comprised of humans.
They don't need any special metaphysical knowledge to make judgements about what is socially acceptable or not.

Those decisions can be both moral and secular, as with my sympathy-morality.
Sympathy is secular. It has nothing to do with religion or "spirituality".

"many things are legal but immoral (example: gambling, drinking, smoking)"

I don't find any of those immoral.
Unwise perhaps, but where's the "moral" element?

"Morality is private".

Morality can only exist in a community.
All by oneself, morality is meaningless.

Does Robinson Crusoe need morality?
No, but the Lord of the Flies boys do.

Morality only comes into being when there's interaction with another (for some, that is God; for others, it's other people or animals).

Dear Shockadelic,

It may be the case that governments don't need any special metaphysical knowledge to make judgements about what is socially acceptable or not, but that doesn't usually help them to know what is moral or otherwise.

Some decisions can be made on secular grounds, but by blind chance happen to also be moral.

Sympathy is an emotion that usually results from a mix of the secular and the religious: some is genetically programmed while some is due to habits formed by spiritual disciplines and practices.

Gambling for example is immoral because it often prevents the gambler from keeping their duties and obligations towards their family. Drinking and smoking affect others adversely. Making oneself ill, besides the direct burden on others, clouds both mind and body and either way often prevents one from taking the right/moral path when required.

"morality is private" in the sense that it tells you what is right FOR YOU to do and what it wrong, rather than what OTHERS should be told to do or not to do.

Certainly, Robinson Crusoe needs to practice morality in relation to animals, but he should also make efforts to keep his health and sanity, so that if he's found one day by a passing ship, he will not become a burden on society. I don't remember whether in story he had a wife and children - if so, then his moral obligation to remain healthy is even stronger.