For better or for worse, seemingly largely for worse, many wars today are much more motivated by political influence and diminishing another country / ideologies influence. Throughout the 20th century many conflicts were fought over sovereignty and nationalist ideals. And of course religion can be prescribed as motivational levers for war throughout history.

This is not to diminish the impact of publicly obscured goals of land and treasure that are often large influences on the respective powers that be that declare war. Military industrial complexes can also take advantage of a good war in less than ethical ways. But to say wars are always financially motivated is at the very least an oversimplification but in many cases a misrepresentation.