I’m glad you brought this up. So many people have honest questions regarding healing. Even those who you would think would be in agreement on things such as “...and by His stripes we are healed.”, are not.
Many years ago I was told that when that actor who played Superman was paralyzed, he layed in a hospital bed next to another paralyzed man. Someone came to both of them armed with the Bible and preached healing through Faith in Jesus. One man believed and was healed; the actor would have none of it. Supposedly there’s a tape of the whole thing. But I’ve never come across it. Do you know anything about this or have any comments?
If/when a believer is healed, it is through the stripes that Jesus took for the healing, but the verse does not guarantee healing to every person who asks simply because Jesus took the stripes.
All it is telling us is the mechanism for our healing WHEN IT HAPPENS.