The problem is that code is language and people who write shit code tend to write shit comments, so no value is gained anyway. The sort of person who'd write good comments will most likely write good code where these comments are not needed, and when they intentionally write shit code they'd probably explain why.

So best you can hope for is that both of these people write comments about why they decided to write a comment, and hopefully the person who writes shit code improves over time.