After we use the restroom, we recite a benediction praising God for our ability to do so. The benediction ends by referring to him as the one "who heals all flesh", viz all people.
In the amida prayer, central thrice every weekday to our prayer service, we recite a benediction asking God for health. The benediction ends be referring to him as the one "who heals the sick of his people, Israel".
Both are true, of course: he heals all flesh and he heals Jews. And I can see why we might mention either fact. But why is each fact mentioned where it is: the one about mankind in the post-restroom prayer and the one about Jews in the amida?