Talk about Psalms 116:15 and Isa 57, leave the strawman.
If precious in the eyes of the Lord is the death of His saints and His will is that the days of the elect are shortened here on earth for them to be saved from evil in this world, where does this leave modern day healers? are they working against the will of God?
Again, God has precisely told us why He allowed certain people to do miracles:
Heb 2:
1We must pay the most careful attention, therefore, to what we have heard, so that we do not drift away.
2For since the message spoken through angels was binding, and every violation and disobedience received its just punishment,
3how shall we escape if we ignore so great a salvation?
This salvation, which was first announced by the Lord, was confirmed to us by those who heard him. 4God also testified to it by signs, wonders and various miracles, and by gifts of the Holy Spirit distributed according to his will.
The gospel was preached and was confirmed in the first century. The things being done today are futility. Non of these are appointed by God.