"dead" stumps provide an essential home to insects, plants, lichen, fungi and other stuff. Rotting wood is essential for a healthy ecosystem. These days it is not seen as unwanted, dead or waste material from a tree but part of a life cycle. It is a living habitat.
So the judges may have seen something different rather than protecting, preserving and prioritising your family and the joyful and creative structures for children's play.
At the very least it would give ambiguity in today's more ecological minded world.
Yeah the anti-eco optics was my first though too - also the voiceover is a little more obviously AI. “Dump chemicals into the forest, brought to you by WD-40” isn’t a super appealing message (regardless of what was actually happening / intended)