Just because an ASI will understand emotions does not mean it will feel them. That is a very important distinction. We do not know what reward system ASI will have, hopefully it will only be the one we out there, but by its very nature an ASI will have components we are incapable of understanding. While watering your plants is by no means difficult, it still takes a minute amount of effort. If ASI does not care about us at all, it will not expend that effort and we will disappear.