I don't think there is any "purpose" to the ecosystem, it just exists as it does. But previously that ecosystem was suitable for what became human life, which i

I don't think there is any "purpose" to the ecosystem, it just exists as it does. But previously that ecosystem was suitable for what became human life, which is why we exist in it, and obviously it's very bad for us if we manage to shift the ecosystem into something that does not support human life. The ecosystem does not "care", it's not a person, it does not have feelings. The only entities perceiving a drastic problem will be animals, including us.