Isn't this article presenting a false dichotomy? How is divesting from fossil fuels mutually exclusive to putting your money behind "tech that helps cut emissions instead"? In the short term at least, you'll have more money to do exactly that after divesting.
The only rationale I can see for having this mindset is that 1) it is imperative to make money in order to reinvest in better causes, and 2) investing in fossils fuels is the best way to maximize profit.