> the standards are there, wishing they didn't exist doesn't invalidate them

But not observing them does. There are standards no one in the world follows anymore. They may still “be there”, but are only used for mocking purposes.

> If a rule or standard seems silly to you, make your best attempt at understanding why people would still follow it. (Chesterton's fence)

The corollary to that is that anyone who rebukes anyone else for not following a standard must be able to explain why it exists. “Because it’s rude” it’s not good enough, explain why it’s considered rude.