Wearables are most useful when awareness is absent. In most other cases, the upside is marginal and the downside is real. The data is noisier and less accurate than it claims to be. Many metrics are proxies. Most measurements vary widely with position, temperature, device, firmware, and context. Yet the brain treats them as truth. Over time, wearables erode interoception rather than refine it.
I need to remember this.
