Extreme conservationism put humans as a "least concern" at best
If you visit the wikipedia article about a specie you will see "conservation status" mentioned there
https://simple.wikipedia.org/wiki/Homo_sapiens
But if you are going to apply the same standard on humans as we do on other species humans would actually be an invasive species, we do indeed cause a lot of environmental destruction which is an unavoidable consequence of being much more successful than other species. We are simply superior and as a result inferior species are now going extinct as evolution continues.
And we do in fact see environmentalists pushing humans to have fewer children similar to how the reproduction of other successful species are artificially restricted by environmentalists (such as castrating feral cats allowing rats to take over).
I have seen some people (often racists) promote conservationism with regard to human 'races' (or whatever) but that's not really something we do with wild animals, we do let wild animals mix with each other.
Of course humans getting conservation status "least concern" does not mean that humans itself should be that but then we have to value other things than merely conserving species for the sake of conserving species. What we should focus on is what is best for humanity, humans should be the first concern, not the last concern.