I believe that everyone CAN make & keep that choice/promise; whether they WILL or not is a different matter entirely.
people make promises they believe absolutely that they'll keep all the time, & then break them - look at marriages! it's great that you've made the promise & can't imagine ever breaking it. however, your seeming inability, or perhaps unwillingness, to understand that others might not feel similarly, in the face of all the evidence to the contrary, seems somewhat obtuse.