This sentiment is too simplifying. Yes, the planet, as in a spinning celestial object with a molten core, solid surface with water, and an atmosphere will be fine, so to speak, but the vast amounts of flora and fauna will not and haven’t been. Some will make it, but I don’t define that as “fine”.
Many animal species, if they haven’t already gone extinct have been suffering deeply. Take a look at the southern resident orca population. We captured, killing many in the process, and enslaved them, all of which served to torture those enslaved and break up the matriarchal hierarchies that existed. This left new, untrained leaders in the population. Before then and since then, we have poisoned them and have completely decimated their food source. These are direct consequences of unneeded, self serving actions of humans. We also harass them sonically. This is a population that is already and has been having a “bad time”, and it’s likely the population will go extinct. The cause of all this is 100% humans. Now take this example and multiply it by the thousands if not millions of species also going extinct and having bad times. Humans and our technological development combined literally form an extinction event.
I see this line a lot but everyday humans are doing irreparable damage to ecosystems. Taking millions of years to heal from events is not ‘fine’.
His point was that we're killing ourself. An ecosystem and a planet will continue existing, the question is whether humans will exist on it.
I think it’s similar to how we view viruses.
And the almost uncountable plants and animals that are already extinct. At least when we go the others will be able to stay.