Yes, it is God’s will to always heal. Unless he wants to call someone home. Or some other unknown reason.
And I do take the messages, of TV evangelist Joel Osteen - to heart. And I don’t advocate the prosperity gospel - as most evangelists advocate it. It’s more a result of contemplating God, like we see in the Fox Golden Key, Not giving money, to the prosperity gospel preacher. How did Mary Baker Eddy of Christian Science - do the healings attributed to her? Not through her theology or the health and prosperity gospel. But contemplating the omnipresence and omnipotence of God. And us being created, in God’s image and likeness (i.e. it is a journey in Theosis - in Eastern Orthodoxy). And in addition - healers, either tapping into the energies of God (i.e. Eastern Orthodox essence and energies) and/or the power of the Holy Spirit.
I have hung around Native American medicine men and women.
And also a Roman Catholic priest, who has the gift of healing and hearing the voice of God.
And I have observed healings, in the Bruno Groening Circle of Friends and the Japanese healing modality Johrei
And I have observed many healings and healing attempts. Sometimes:
A person is instantly healed - even from incurable diseases
A person takes a bit of time to heal - even from incurable diseases
Sometimes a person is partially healed - even from incurable diseases
Sometimes the person is not healed or eventually dies.
And I’ll give an Eastern Orthodox answer. It is a divine mystery, as to why the different results.
And the person is normally also seeing traditional doctors and specialists, along with the traditional medical tests. God works through doctors, healers and alternative medical practitioners. But when God wants someone to come home - they come home. But it is our duty, to avail ourselves - of every good healing option.
The Roman Catholic priest says God always answers prayer. He either gives us something now or something better for eternity.