Taylor has stated repeatedly that there will be no death or things like that. If you want something like that, wait for mod support.
The game already isn't realistic, and that's a good thing. There's no way in real life you're gonna hose feed someone for 250,000 calories. I think death is a fetish a lot of people (including myself) don't really want for a fun dating sim / sandbox feederism game.
I think toning it back to where health conditions serve as afflictions that limit a character is okay though. Especially towards the player, as it could definitely fuel a risk = reward type of deal. You eat with a girl, or girls, you get fat, and you have to manage your weight or afflictions. So, you're not entirely off, it's just a bit too extreme for the kind of game it is.