A fundamental ambivalence drives Monster Trucks: fossil fuel economies are terrible for all life on earth but some of the products of fossil fuel economies, like large trucks, are cool, so if we were able to do away with internal combustion engines and allow our trucks to be inhabited by tentacled beings who would treat them like hermit crabs treat mollusk shells that would be an ideal solution, maybe.
Despite some stiffness of script and occasional tonal slippage, Monster Trucks is a delightful revival of 80's robot/alien/monster-on-the-run-from-evil-corporation/clueless-feds-gets-helped-out-by-kids movies. Rob Lowe is an excellent evil oil executive but most of the humans here seem diffident and locked-up, especially in comparison to the warmth, humor and range exhibited by the Hollow Earth Tentacle Beasts who are completely awesome.
Fracking is bad. Tentacles are good. If we as a species can learn anything in the 21st Century, that might be a decent place to start.