We understand the nature of a problem, and we carefully contemplate an ideal solution. Everyone should see how great an idea it is, and there should be no opposition.
Unfortunately, we often assume everyone is rational all of the time. A good idea will be supported because it is a good idea. Experience eventually teaches us that those around us will make irrational decisions, often born in fears that have no realistic basis. Be prepared to sell your ideas not only in response to legitimate questions but also to ill-conceived fears others might express.