According to https://meta.stackoverflow.com/help/whats-meta, the MSO-unique "votes as agreement/disagreement" is limited to posts of type feature-request. In practice, however, this guideline seems to be fairly commonly ignored; pretty much any question that includes an opinion is fair game for agree/disagree MSO votes.
To what extent that's because people are not aware of the policy, don't look at the tags or simply choose to violate the policy, I'm not sure. I know that the FAQ wording was changed recently, so perhaps we need to "give this time". But in the face of prominent MSO users having promoted other points of view, particularly with respect to discussion questions, I wonder if only changing the FAQ makes sense.
I can think of other actions that might be helpful to bring behavior in line with policy, including possibly altering the policy, but I hesitate to list any of them in this question for fear that they'll prompt agree/disagree responses, this question's category notwithstanding. And let me say explicitly that I can fully support not doing anything else, if that's the collective wisdom. I'm just asking for a discussion. :-)