i think its the wrong idea from its core that we deem ourselves responsible for the whole planet when we do not even manage to take care of ourselves. Let me try to explain you the difference:
we do not kill the planet or all life on earth with our behaviour, we kill us and a few or the most species in the longer food chains or forcing them to adapt atleast to the new climate and circumstances like the plastic everywhere but nobody is really believing that life will be destroyed by this. not even covering earths surface with nuclear bombs would be able to kill all life in a matter of fact. there are plenty of organisms who can live through radioactive environments, extremely toxic water qualities and without sunlight.
People in not so rich countries have a hard time caring for trees or animals when they themselves feel endangered to die or further impoverish, thats absolutely normal and within our nature to survife, no matter what. In merchandising the idea as "save the planet" instead "save humanity and in fact themselves from catastrophic changes leading to war and further impoverishment" you might feel like a hero saving the planet in the end of the day but you demotivate the poor half of humanity to actually take part in the action.
Nature is not developed and does not work through a thought through system of balance that is artificially enforced by someone, it works through much stronger mechanisms humans are far, far, faaaaaar away from mastering or even understanding and we simply cannot hope to mess with it successfully. we are not the masters of nature, we are part of it and thinking otherwise and effectively believing we are able to shape the world to our will "on purpose" (nobody is doubting were right now shaping the environment) is dangerous arrogance that will do more harm as good for ourselves in the end.
conclusion: when we look on environment issues you should always brand it in a way that its about humans if you want to have an impact and be atleast aware that stopping a specific species that is not of direct value for our own survival to go extinct has no greater good as keeping a pretty stone in your house to look at it. Use achievable goals with direct positive effect, do not intend to heal the whole system but trust in natures ability to balance itself. be aware that this "balance" could very well mean that we as species are endangered to go extinct if our actions and behavioural changes are not strong enough which could mean drastic measures, even undemocratic ones might be necessary to save us.