To be clear, it's possibly a political statement but it's hardly an ad, at least in any sense that people (Americans?) traditionally use the term.

I also don't think that the existence of 'more important' issues precludes the discussion of other issues that may be relevant to a large number of people (or a small number of people, for that matter). I would certainly find it annoying if every political conversation I took part in were interrupted with "Well, that's nothing to be compared to climate change", even if I believed it to be true.