I can completely see your point — for me, your strongest sentence is “… the funny thing about antidotes is, over time, they can be just as deadly as the poison”.
But I would counter argue that although this is true, the value of antidotes far exceeds their danger.
In the Heineken ad (now lets not get too worked up, we are talking about a multinational trying to manipulate individuals to drink what is a pretty ordinary beer), discourse, non-judgemental attempts at understanding, empathy, even amongst individuals who might, for whatever reason, be quite bigoted in their outlook (and there is always a reason, ask any psychologist) leads to a developed understanding, a shared perspective, a movement towards a less-bigoted, more constructive viewpoint.
This is the real power of the ad. (Please see caveat “now lets not get too worked up…” above.)
Yes, they use an exercise that is quite well designed to encourage individuals to use neuropathways to solve a problem and possibly let down gurds in doing so, encourages them to practice limbic system processes so that a change in attitude may result. They may be, ultimately, constructing a bar and drinking an average beer. But it works!
Lets have the whole world constructing bars and drinking average beers, if that’s what it takes to achieve the Coke-hilltop-connectedness outcome.