Possibly peculiar for you. If you don't find value in maintaining your privacy, there's no reason to put others down that try.
In any case garmin watches are not all $800.
In comparison, most other devices require activation to work. Have you tried to use an apple watch or a fitbit?
I have a garmin watch, have never used bluetooth, wifi, garmin connect, etc.
It keeps track of my health and activities, motivates and makes recommendations. It's really useful to track sleep and fitness level.
The only local thing it does not do is EKG, they lock that until you go online and give your location as in the US.