//
Why should it? It isn't any different from cancer eating away inside a human.
//
I was about to counter this as I picture cancer as mostly being out of control growth, forming a lump, pushing outwards but, on reflection, some the cig-packet pics do portray types which eat away at parts of the body.
The distinction I'd make is that cancer is not an organism, as such and it would be an own-goal for you to suggest God 'designed' it. A genetic 'switch' has undergone a pinpoint mutation (chemical damage, UV, cosmic rays, ionising radiation) and turns the cell into a stem cell-like thing.
//The wasp in turn, will no doubt be the prey of another creature. //
True. Meanwhile, you'd think that Creationists should leap on these inter-dependencies (eg pollinators/flowering plants) and jabber on about irreducible complexity and how the heck multi-host parasites manage to evolve. (I don't think even mainstream science has worked this out yet and Creationist guff might help kickstart the funding applications. ;)
//Sentimental rubbish!//
Maybe so. What about ideas like being reunited with our dear departed?