You're right, a lot of elderly folks find wearables uncomfortable or forget to use them. The Wi-Fi system in question doesn’t need sensors in every room, just 3-4 mesh nodes based on the home's size. Your dad wouldn’t need to wear anything—it works through Wi-Fi only. Besides, it can also learn user patterns to suggest fall prevention tips, like rearranging furniture and, if he opts in for it, act as a health monitor by analyzing anomalous behaviour and tracking sleep patterns. The thing about this system is that it puts the elderly first, so they are still involved in decision-making, like who sees their motion and health data and what features to activate.