Also, I challenge you to back up your statement that Greco-Roman traditions espouse the idea that the gods had to be worshipped only because humans could not oppose them. I have never heard that interpretation of the ancient Greco-Roman religions, and it implies that the Greeks and Romans saw themselves as slaves to the gods, forced to venerate them in the absence of any way to free themselves. This does not jibe with anything I know about them.
Look at the myth of Prometheus, and about half of the myths that involve mortals going against the gods (the other half is "perils of hubris" and "violation of sacred law"). The moral of the stories is "the gods were cruel, but opposing them is futile unless you are
extremely clever" (Odysseus comes to mind).
The Romans had a very interesting world-view where the natural world was seen as female, and ripe to be conquered and dominated by the male civilization, spearheaded by Rome, of course. The Romans (Cicero comes to mind) had a significant school of thought that religion was merely a method of social order. On at least one occasion, a Roman general saw the result of the augers (which was unfavourable for battle), told the army that the omens were favourable, and after the battle had the auger executed for lying about the omens, and was lauded for this act by several military scholars later. This exemplifies their rather practical approach toward religion, as does the standard siege tactic of offering to essentially buy-out the god protecting the city they were going to sack by promising to build a bigger, better temple in Rome if they won the battle. I think if the Romans thought they could conquer the gods, they would have tried.