So when you go out with a diamond ring, your relatives and friends will not feel bad when they see it.
It's just that rural people nowadays are very face-saving, so they think that if you don't give them a banquet, they will think you are stingy, so their main point is that although you and your husband's family are married, they will think you two are stingy if they don't give a banquet.
But now many places have adopted novel marriage methods, such as tourist marriage or naked marriage, and news media often see such things, so sometimes your relatives may understand you especially.