Question about Garmin fenix 6

I went to the emergency doctor on Saturday and had to have my pulse, blood pressure and oxygen saturation measured. The doctor had a value of 97% and my Fenix6 showed 96%. So it was relatively accurate. The pulse was also exactly the same, even the doctor was amazed.
But my watch shows me more than just the individual values. For me, the body-battery values have become a new unit that I pay more attention to. The balance between performance and relaxation has never been so clear to me. For me, there is now more rest time! Because of the Fenix 6 - Good health to all.