Vore is a fem domination thing. If it were done with male predators, it would get quite abominable quite quickly.
It would be re ganking the un ganked lol
Vore being sexualized has a large part to do with exaggerated proportions, geometry, bdsm and certain mysteries to do with biology and the beast within's vestigal lizard brain.
I think mainly, though, it has quite a bit to do with the miracle of the female body ( As this author points out in their writing)
Vore is largely a role reversal fem top genre.
For best results anyway lol