With just a “for” or “against” vote, you are concerned there won’t be discussion about better or alternative decisions for the issue. If there’s no discussion, team members won’t know why a decision should be made for or against a certain
solution. The other answers are incorrect because you want the team to choose the best decision for the project, not the solution you are in favor of; the concern of members voting for the cheapest or fastest solution doesn’t address
the primary issue, which is not allowing discussion regarding the decision.