While not a fix, she does go to the fast food job to order, so you could get the weight back up that way (but since that event is random...)
Honestly, I think there are edge cases, some events (particularly with two characters) could have softer restrictions (like being stage X+ or stage X to Y) but part of it is clearly Sprites and Text, having them be dynamic means a lot of nonsense with variables, and switch cases, but it could be done