there's a chance that our sims might get checkups someday

I like sick Sims in principle, but TS4 made sickness reallllly annoying instead of a meaningful addition to the game. In TS2 there were real stakes if your Sim got sick, and they looked actually sick instead of getting annoying stripes all over them. (The amount of time my brides have gotten stripey at a wedding right before they say their vows is unfathomable.) Insta-buying the medicine off the computer without even an animation also makes TS4's version of sickness pointless.