It's something that was done to them, not something they chose. Being able to create bodies in Liminal Space lets them avoid having to devour people here and elsewhere.

[Not that certain of them don't make do if they have to, but that's probably not something Cassandra should be mentioning to this person. She's not sure she should be telling him that this was done to them, either - she's not sure it's her place - but it's probably better that he knows that those with the Atma virus, or at least those here, aren't acting out of malice.

Granted, she doesn't care so much about this man's comfort as she does not making life harder for Lupa and the others.]