You have family who check on you every single day and it's the cat you're worried about? I'm my cat's fourth owner; two before me died. The cat was down for a bit but is ultimately fine. The nine lives saying exists for a reason. I say this respectfully: It's good that you care but maybe there's some vanity at play here?
In what way are you seeing vanity in this situation? That they don't want their pet going to anyone else? I mean..that could be said about most people and their pets, their loved ones, their material things, anything they are sentimental toward, etc.
I'm having trouble understanding what you mean, also by your first statement. Are you implying OP should be more concerned about the family's reaction than the cat's? Genuinely just wondering what you meant.
Cats will eat your dead body. Do you really want that?
This is a possibility. Even if you're not dead for long, I think I read something about pets not just eating because of hunger, but chewing and mutilating the body as a form of frustration trying to wake their owner, or simply from being stressed out by the situation if they sense something is amiss.
For instance, when I cry or whistle, my cat will attack me and bite me until I stop. It causes her distress, she tries to get to my mouth to see where the noise is coming from. The difference is that I am alive to stop her from taking it too far, if you're dead, your pets will have no cue that they're hurting you.
Then again, it is entirely possible if you are found soon, your cat won't even realize you died, they may even be fast asleep the whole time. Some cats are just oblivious. But I would still err on the side of caution.