I don't agree with your point about non-immunity. Cultural imprinting works because it leverages the desire that humans have to portray a certain image or belong to a certain group.
As rational humans, we can eliminate the pull of such ads by building our own understanding about the group the ad is appealing to, and how that ad appeals to the group. Equipped with this understanding, we can find far more effective ways than drinking Corona to portray the image of being chill and relaxed.
Alternatively, we can reconsider our willingness to be included in that group. Once we realize the only thing binding Corona drinkers together is their collective vision of some beach, we might realize that there's more interesting people to drink with.