So you are forcing people who are neither in favour nor against something to produce false pro/contra votes. There are some cases where this strategy makes sens

So you are forcing people who are neither in favour nor against something to produce false pro/contra votes. There are some cases where this strategy makes sense like questions about controverse topics. Other than that it produces noise. In my experience, the debate 4 vs 5 options often has more to do with the authors' personality and training than anything else. Surprisingly little is based on solid, non-ambiguous evidence.