The thing about human-caused things is humans can choose to stop doing the causal things.
The set of potential solutions would be quite different if the cause wasn't humans. Might even be impossible.
But we have quite a lot of evidence that we have been affecting the climate pretty substantially since the beginning of industrialization and increasingly so since, so it makes sense to work on the human causes.
I disagree. I think if we stop using oil and gas, we fall into a new dark ages pretty fast and half or more of all humans will die. Is that what you intend?
We have more options than just (instantly) stop using oil and gas and those options would have been far more easy to implement had we been doing them for the last 50 years instead of arguing about if climate change is happening, and now, if humans have caused climate change.
These other options require resources and time to implement, and the political capital required to make that happen has been and will be increased because of the aforementioned 'debates'.
The set of potential solutions would be quite different if the cause wasn't humans. Might even be impossible.
But we have quite a lot of evidence that we have been affecting the climate pretty substantially since the beginning of industrialization and increasingly so since, so it makes sense to work on the human causes.