We're told that governments help us solve collective action problems. If it's hard for a single electronics manufacturer to wean itself from conflict cobalt, the government could help them by forcing all electronics manufacturers to cease purchase of conflict cobalt.
Of course, that isn't the real purpose of governments or any other illegitimate authorities, so I won't hold my breath.
This is about stopping the exploitation of children. While you're trying to squabble over whether or not some random internet person is using a keyboard with cobalt in it, children are being forced down into these mines and risking their lives.
Of course, that isn't the real purpose of governments or any other illegitimate authorities, so I won't hold my breath.