I agree that a mere wish is just a goal without means, but nevertheless it is still a goal. Some wishes my be harmless, while others may not. For example, you wish to have an ice cream and you don't have the money. Even if you come to "power" and buy yourself one, it is still harmless (unless you feel sorry for ice cream being eaten). On the other hand, if you wish that something normal/natural would not be shown in films then that is not harmless any more when you come to power. As I said, even if you are consciously not willing to directly impose it, there is a very high probability you will do it subconsciously. Not to mention people change when they come to power, so even if they now say they would not willingly impose, they might as well do so then.
I think a very good indicator whether you are the kind of person that would impose your ideas on others (if you were in power to do so) is the way you handle your kids. When it comes to kids, parents have a great deal of power. So for example (if you have kids and if you are religious), did you impose your religion on them or did you let them free and allow them to decide when they would become old enough to do so?