Every time you load your lot you have to redo this, but it works to switch off the wants and fears. You also need to repeat this if you went into CAS, hopefully it will be fixed one day so that this is not necessary. Go to your gameplay menu, select the wants and fears and click accept, once accepted click on it again to remove the tick and click accept again and it will be removed, now play your game. Do this on your lot of your sim and repeat it every time you sim returns to the lot ;)