Splintered
unsavory tart
Well, a lot of this is just my theory but...Really, we only got Barthandelus'/Orphan's opinions of humans. In this, I don't understand XIII-2's 'false gods' bit, in which I do agree with the above comment on this.
We did not get the other fal'Cie's opinions - which very well could have been different. There's a difference between doing one's duty and agreeing with it.
The false gods comes from the part that Cocoon is 'technically' a theocracy and many viewed fal'cie as godlike. At least, that's what the official sources say, I never got that vibe playing the game with the exception of Dysley's clothes. Personally I think it is much more meaningful if they were just straight up representing government in general.
amy theory in the game is that the other fal'cie knew about Dysley's plan but just didn't give a shit. This seems to be the thinking in Pulse anyway, where fal'cie live next to the people and not rule over them. Still it doesn't mean they won't fuck humans over if they think they should. It's just that there are no hard feelings.
The fal'cie come from a long system of slavery imo. B-man begets Hallowed Pulse and Lindzei with a focus > Lindzei and Pulse beget other fal'cie, who also don't have a say in what they are allowed to do.
Humans are different, they come from Etros which had a focus and power taken away from her for being to much like Muin. So when humans are created, they aren't given a focus. Only fal'cie can force one onto them, but humans were given "chaos" by Etros and therefore have the power to overcome their focus.
Plus I think humans probably would need to find an alternate source of energy outside of the falc'ie. Cocoon all but had their ass wiped by their fal'cie, too much dependency has always been a bad thing in Final Fantasy and it was definitely a problem they needed to get away from.
I can't find the source but iirc, all fal'cie want to summon the maker. Dysley wanted to do it by destroy a large amount of human lives and therefore throw open to door to the invisible world where Muin was.
The pulse l'cie do it by trying to wipe out specific monsters and giving humans the focus to destroy them (ironically creating more because failed l'cie turn into cieth). But they do it regardless of how people are doing. Pulse had the War of Transgression because Cocoon was stealing their resources, and since they lost the war and Cocoon continued to steal all their shit, there weren't enough resources to go around.
So one of the dialects points out that shortly thereafter Cocoon gets embroiled in a civil war that greatly reduces the population. But despite this the fal'cie are still using what's left of the population (which isn't much) and turning them into l'cie to continue their monster hunting duties. This is what effectively destroys all of pulse civilization and why anything that remotely resembles a town is covered with cieth.
tl;dr: Not all fal'cie want to screw humans directly, but they want to summon to maker- even if it does screw humans in the long run.