Well, I think that box or not, human remains are never deep enough to be converted into oil...Rather, they are broken down by soil organisms and are eventually incorporated into the sub soil.
And people, or more correctly first hominids, emerged approximately 4 million years ago whereas oil deposits were formed between 70 and 250 million years ago...Just to put time periods into perspective.
Nonetheless, the current issue concerns human society in the 21st century, and the impact that more extreme climatic events will have on modern infrastructure and burgeoning human populations with their associated expectancies.
And for sure, simply in terms of species, our ability to adapt and survive is unlikely to be in question.
And if you are an ageing human, secure in a mountain hideaway, then you can probably afford to be somewhat blase about extreme weather and environmental events that might affect others in less secure places.
And let's be clear, the current issue is not relative to long term variations in the Earths climate. It concerns an increase in average global temperatures over a very short period of time, that can be attributed directly to the rate of extraction and burning of fossil fuels by humans.
So we keep on as we are and say what the heck, or we attempt to address the issue. You run with the first option, and others think the second option is somewhat more prudent...Which I suppose is typical human behaviour.