Ergo, the kind of posts where someone gives advice or makes an opinion identical to a previous post are also Plus Ones in essence and should therefore be included for deletion. Rules should be applied objectively, not emotionally. Even if certain posts are less annoying than others, the rules should still apply.
The rules happen to be about 'making posts with only one or two words (e.g., LOL) or a smilie' not about agreeing per se. That's pretty clear.
None of us moderate to what things are 'in essence' or context. See Q's post above. Sorry to disappoint.