I didn't need one to know that, but I was surprised by how little drinking would change my resting heart rate (even two beers at dinner might keep my heart rate elevated for half of the night) and by how much/how long heavy drinking can affect RHR/HRV - a heavy night might affect RHR for 2-3 days...

I don't think the product is targeted at people questioning the health effects of their heavy drinking, but rather at people questioning the effects of endurance training, long commutes, or other habits that may be inadvertently causing them long-term harm.

Measurements are a great motivator! When I was starting an exercise regime being able to track my progress with a WiFi scale was a huge help. Losing one or two pounds didn’t make a huge visual difference, but damned if I wanted to keep driving that line down.