So if a person is pulled over, arrested and charged with DUI despite not having been involved in any accident, who, exactly, is the victim?

Do try to be specific.

And it is not "freedom" that puts someone at risk, it is action. Such an action is, um, actionable if and only if it creates actual harm to an actual victim.

Otherwise, again, people are being penalized for what *might have been*. This idea is the root cause of an enormous amount of oppression and suffering in the world. Do you really think that is a good idea?

There is no reason for DUI to be a separate, standalone offense. If an intoxicated person injures or kills someone with their vehicle, they are guilty of gross negligence and/or vehicular manslaughter.