One thing that people underestimate with Malthusian thinking is that we live in a dynamic system. The amount of oil that is "out there" is connected to the oil price. Sometimes that supply effect of higher prices is limited (we are, potentially, seeing this with copper) but if you are projecting linear trends, you don't understand economics (and btw, this was the issue with the original Limits to Growth and almost all of these studies...for some reason, people who are attracted to this problem spend more time fooling around with their toy models rather than just talking to someone in mining or O&G).
That being said, it is equally true that very few people who study economics actually ask basic questions about how and why economic growth occurs. Economic growth is just energy consumption. That is it (whether humans burning food or oil or gas or whatever, the industrial revolution was about unlocking energy for production...note, this plays no role in Solow growth). And if you build a system which is unable to improve efficiency than that process is logically finite (but, as in paragraph one, no-one knows how finite...you can do all the computer simulations you want, no-one knows...a good example of this is shale oil, Russia has unfathomably large resources of shale oil...everyone knew it was there but it didn't matter until fracking, peak oil was a mania).
So I don't think anyone is really asking the right questions. It is really simple: do we want free energy? Do we want to improve the efficiency of our energy use? Even if climate change wasn't happening, we would need to look at solar/wind/whatever (and, hopefully, this will lead to a new industrial revolution). Imo, population control is also important. We can improve energy use but population will just grow to fill the space (and part of the problem is here actually poor quality elder care and weak pension systems caused by low savings rates). Obv, population control isn't popular anymore but...it makes sense once you understand economic growth.