It's wrong to assume that you can just convince people to give up their fossil fuel SUVs, but that means another mechanism has to be used to make them, not that aggregated personal choice doesn't have a huge impact.
This campaign promoted an inefficient mechanism, fully knowing it wouldn't work, but that doesn't mean that peoples lifestyles don't matter.
Arguing that only industry needs to change is also a cheap cop-out, belying the scale of the problem.