Almost certainly, if they don't know anything about you they can at best show the median/average outcome. Some of this can be counteracted with local processin

Almost certainly, if they don't know anything about you they can at best show the median/average outcome. Some of this can be counteracted with local processing, but that's not really hardware efficient, e.g. you wouldn't consider running a Google instance on everyone's phone. Breakthroughs in how we do computation could change this, but it would need to be a significant breakthrough, e.g. in homomorphic encryption and differential privacy or huge progress in compute/storage price/density/energy usage.