By your logic we all should get those devices that you wear so it can auto call if you fall down.
It’s more like a “if I already have one, why not throw it in my handbag just in case”, since if that the 1 time out of 1000000 that I’ll need it, having a phone with me might save my life.
I don’t have a phone addiction so bringing it with me won’t cause any issue
Just throwing in that little 130-200g device into your pack doesn’t modify/impact the activity you are going to do. It’s just extra safety.