Not a chance in hell. They'd be worthless after sitting for 10 years with no maintenance and loaded with fuel, fluids etc

Well, aside from the logistics of it, it thematically doesn't fit.
The Psychlo were very proud and thought themselves very savvy and technological, but they were beasts and morons. The humans, viewed as beasts and morons ironically by the Pyschlo, were infact ingenious and hardy and hungry for knowledge.
So what better way, for the humans to triumph over the Psychlo, than a last-hour contrived military engagement where they win simply by essentially physically overpowering their enemy?
I want Morgan Freeman to narrate the last bit of this film: "Foryou see. With great effort and ingenuity, one can triumphforgiving a third act reveal of a huge military arsenal and a weak contrivance. It's a real archetypal sort of tale I suppose. But speaks to the nature of bad writing and thematic abandonment."
Edit: It's like how Rutherford accidentally/successfully first split the atom. He tiredlessly studied, tested hypothesize, observed the results, ruminatedand then got tired of doing that, and he just beat an atom with his awesome Rutherford fists until it split.

Yupbatteries or powere supply should be dead, and the fuel would have evaporated. And plastics, any synthetic materials woukd have deteriorated.
I expect those machines have a team of full time repair techs to keep them flying.
The primitive ape guys went through a few sessions of brainwashing suddenly know how to fly them.
Just another chasmic abysmal plot hole.
What a genius Lafayette Ronald Blowhard was.
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