While I get the concerns about battery life, like most things in tech it's about weighing different tradeoffs against each other. Battery life, ecosystem, quality of sensors, app availability, resale value, etc.

I already have daily habits around charging, so that doesn't bother me, and if I'm traveling I can either bring a charger or put the watch in low power mode where it lasts a surprisingly long time.

My Apple watch purchase was basically for one feature. Fall detection, and automatic 911 calling. I bought the watch when I had a close call with a car while riding my bike to work, and wanted to make sure in case of an accident, I'd at least probably die in the ambulance and not on the side of the road :)