No we could not. We literally physically could not. We wouldnt be able to maintain the huge myriad of systems we do in fact need to survive while doing that.

We couldnt even, without external dependencies, support humans artificially in biosphere wtf makes you think we could do it on a planetary scale...

We have no idea what systems we really need to survive. The claim that it needs an unmanageable myriad of systems etc. is a hypothesis that might turn out to be not true.

We might very well be capable of providing a minium set given enough energy at our disposal. Life might not be pretty etc. in the such a case, but that isn't the point here.

Theoretically sure, remotely probably, no. This is how interacting with sufficiently complex systems works, eventually you just need to accept that it cannot be fully quantified and rationalized.

Also you presented it as 'we could just strip mine the world' lol, not exactly a nuanced take

Wasn't supposed to be a nuanced take. The idea that huge complex systems in intricate balance are needed for humans is just not well supported.

It is tho... its literally the only way humans have ever been sustainably supported