That's the great thing about 'game theory'. The rules can so easily be set up to funnel 'players' inexorably into "WarGames"-like resolutions. I.e., no matter how well the game is played, everyone loses (phrased rather more effectively in the movie, though).
Realistically, though, the comparatively slow march - in "WarGames" terms, but not human lifespan terms - towards the conclusion for our species, clearly won't result in equal losing over given near-term timeframes. That is almost certainly one of the calculations* for some players who continue to push destructive patterns.
Human activity (think economic) is incredibly interdependent as well as massively interwoven with an incredible array of aspects of our planet. There are always 'externalities' - i.e., the cost of goods and services probably ALWAYS (even in really 'primitive' economies) is missing a little bit in the accounting, so-to-speak. For example, when Virginia was fairly well-settled by Europeans, with many of the original inhabitants pushed out, tobacco was king. But growing tobacco is very hard on the land - tobacco is a crop that depletes soil very quickly. The solution, at the time, was to just develop a new plot after several years. Land was absurdly abundant from the perspective of the colonists of the time - and people like Lord Fairfax had tremendous tracts (his represented a substantial part of the current state). All of the decades and centuries that went into producing soil that led to great tobacco production was an externality. The environment, original inhabitants of all types (including ALL organisms), etc. contributed to ... or, perhaps better, SUBSIDIZED the tobacco production for those who moved in. And those who moved in generally never paid any of that back. It did cause problems for some, and people did switch crops grown over time ... were generally forced to adopt more sustainable practices ... (as well as ceasing, ultimately, other ways of externalizing costs generally FAR more reprehensible), but, the debt wasn't really repaid in just about any real way be those responsible. And, who actually, in some sense, effectively stole (beyond all of the other shades and types of stealing in the whole story, as we might frame it today) a massive amount of 5hit that it's not clear they had such a 'right to'.
All of this can get quite complicated, and that itself illustrates some of the problem - there is no 'analytical solution'. There are always trade-offs of various types, and practical 'solutions' come together one way or another over time. But, a lot of current issues don't have the solution of 'just move to another plot', no matter what dimwits like Musk think or say. And, even those who have some conscience and conscientiousness are always faced with the sort of impossible problems of ethics you are touching on. But, the passage of time will always lead to practical solutions - one way or another.
* Or part of a set of rationalizations, for those with a conscience of some sort - possibly even coupled w/ true delusions or grandeur, such as saving the species as a whole. Likely delusional in some heads, outright dishonesty in others.