The problem is encryption is useful for many things. Some good, some bad. It's great for underground humanitarian organizations in third world countries...it's also great for kiddy diddlers hiding their stash. But the tech is the same, so we pick both or non. Right now, government is leaning on none.
That's not a problem unique to encryption. Firearms have good uses and bad uses - you can hunt and feed your family, or you could kill someone. With a powerful privacy advocacy group, as proposed by OP or like the EFF as mentioned by others, you can have the same voice like the NRA does to promote responsible "good" uses of firearms but for privacy technology.
