hey its not directed at me but I'll ... answer anyways....
first God heals not people and no one will be COMPLETELY Healed until this comes to pass:
R
evelation 21
4 And God will wipe away every tear from their eyes; there shall be no more death, nor sorrow, nor crying. There shall be no more pain, for the former things have passed away.”
the select people being healed part? that made people mad when Jesus answered. He did NOT say it was lack of faith but that the healing was by GOD's will NOT men's wishes. here are the scriptures.
Luke 4
23 He said to them, “You will surely say this proverb to Me, ‘Physician, heal yourself! Whatever we have heard done in Capernaum,[l] do also here in Your country.’” 24 Then He said, “Assuredly, I say to you, no prophet is accepted in his own country. 25 But I tell you truly, many widows were in Israel in the days of Elijah, when the heaven was shut up three years and six months, and there was a great famine throughout all the land; 26 but to none of them was Elijah sent except to Zarephath,[m] in the region of Sidon, to a woman who was a widow. 27 And many lepers were in Israel in the time of Elisha the prophet, and none of them was cleansed except Naaman the Syrian.”
28 So all those in the synagogue, when they heard these things, were filled with wrath, 29 and rose up and thrust Him out of the city; and they led Him to the brow of the hill on which their city was built, that they might throw Him down over the cliff. 30 Then passing through the midst of them, He went His way.
If the purpose is not to Glorify GOD and bring people to repentance and forgiveness of their sins through the blood of Jesus, to tell them of His death and resurrection and ascension and spread the GOSPEL message then it is most likely a false sign and wonder sent to deceive people and people should heed Jesus warning:
Matthew 7
21 “Not everyone who says to Me, ‘Lord, Lord,’ shall enter the kingdom of heaven, but he who does the will of My Father in heaven. 22 Many will say to Me in that day, ‘Lord, Lord, have we not prophesied in Your name, cast out demons in Your name, and done many wonders in Your name?’ 23 And then I will declare to them, ‘I never knew you; depart from Me, you who practice lawlessness!’
not going to touch the last two questions....