Are Sims supposed to be sick & imbalanced like 90% of the time?

Yes, this would have been smart. Getting this sickness more than once per week is ridiculous. 

Also, if you go into game options & pack settings, you can uncheck it, but they will still get sick. 

Also also... wanna hear something sad? Most of the settings in my pack settings are turned off. I buy the game & turn off the features because they implement the majority of them in the stupidest way possible.

I think they probably know it's going to be stupid, because they seem to put those features in there so we can turn them off. It's like they try it, they realize it's going to suck, and instead of coming up with a better idea and programming a more fun game, they sell us the game touting the features, and give us a way to shut them off so that when we inevitably start complaining about them, they could tell us to just turn it off. But they can still act like we got our money's worth, because all these features are part of the pack. 

I love this game, but it would be so unplayable without  modders... they are so much better at making actual fun gameplay features that work well. Honestly I wish EA would just hire the modders to make new packs and/or updates.... or let them sell them and pay them a royalty program or something. Every time I take out my mods to make a clean slate for new patches & packs I go through this and realize h ow unplayable this game is without mods.