I'm not advocating against social norms. But just those that don't make sense and only exist because they already exist.

My personal design for 'the society we ultimately want' would be social norms based in proper values (i.e. being nice to eachother, allowing people the freedom to do whatever, not being bothersome, etc.). From that would follow the norm to give up your seat to an old person, and the norm to help your elderly neighbor carry something heavy.

From that would not follow that we can't wear our hats indoors, or that we need to say sir and madam, or that we're not allowed to play music on speakers in public, or that we can't have a call on speaker phone.

If someone is being obnoxiously loud is a different matter.

I went to a baseball game the other day and kept my hat on during the national anthem. We can ignore whichever ones we want, we just have to accept the consequences for our actions.

Other times I'll go along with a social norm I don't see the logic of because it's not doing harm and no inconvenience to me and it's easier than dealing with the alternative. I guess that's why they persist.