It's a british thing. The emperor represents the royalty, sucking up the life of its subjects to keep a rotting corpse alive one more day

I mean there's the Old Ones that makes dyson spheres and also eat stars but they got beaten by space robot ancient Egyptians

Hmm IIRC there's also space BDSM elves that captures stars and bring it into a pocket universe for energy. Said space BDSM elves managed to murderfuck borne a god of excess and perfection and tore a hole in realspace to literal hell made out of sentient beings' emotions.

Then some bloke recently make that hole bigger spanning half of the milky way.

Warhammer doesn't do "thinly veiled allegory."