How do you phrase this statement as a question where you can pick a side? "The benefits and/or disadvantages of a war draft."

A good example question would be, "Should governments be allowed to draft their citizens for war?" The use of the auxiliary verb "should" prompts the respondent to describe the conditions under which either a government should or should not be allowed to draft their citizens. It does not leave the respondent room to entertain both sides of the topic.

Another possible question would be, "Is a draft system beneficial in times of war?" This phrasing forces the respondent to declare their opinion one way or another or, in other words, to pick a side.

The key is to avoid open-ended questions where people can express an opinion on both sides of the issue. An example of this type of question would be, "What are the pros and cons of a war draft?"