> Meh, our ability to change the earth grows every year sooner or later we'll fix it.

You are talking about geoengineering.

It would be way better not to have to do such things in the first place. This is like "meh, sooner or later we'll be able to grow entire organs, you can keep smoking". Sure. But is that day coming soon enough? And what are the drawbacks of such a large intervention?

Besides, species are going extinct every day. We can't get them back.