My point isn't what should be, it's what is. If my goal is to convey a message to other people, it seems wise to use a language that the other people actually understand. Using a symbol knowing that it will be widely misunderstood seems counterproductive, and people doing so shouldn't be surprised when their message is misunderstood.

That sort of thing is why, for example, people in the west don't use the swastika to mean "good fortune", even though that is what it has traditionally meant in the west prior to WWII and what it still means to a lot of the world.