This isn’t a case of the media cherry picking. Up to 70% of Australians support military aid for Ukraine so the reason that this is being reported on is because it’s not in-line with mainstream Australian views.

If focusing on the most unpopular single thing he said isn’t cherry picking, what is?

Most Greens leaders are experienced politicians but they all seem fall into this pattern, even though they should see it coming. Left-leaning-leaders in general make the mistake of getting bogged down on an ethical position (no arms trade) that has minimal effect on the grand scheme of things (Australia has hardly any weapons industry compared to most European countries) and letting it turn people off their party rather than considering the realpolitik effect on the popular vote.