It does say silence on positive things. Read the opening section. Of course if you do read it you will put yourself in an extreme minority but that is something you may have to accept.
The page, WP:BLP, says silence on positive things. WP:BLP is not policy, it's an imperfect description of policy. When was the last time you saw someone remove positive material from an article citing BLP? The page talks about "contentious material", how that is interpreted, however (and it's the interpretation that is the policy, not the words) is as "negative material".