I think you overlook that holy book says “only” God answers prayers. And pray to God for he will answer. The answer doesn’t necessarily have to be the answer you think is correct.

A leg amputated is a leg lost and the journey of a test and struggle that begins next. That’s an answer. Not a lie.

Once again, the writer doesn’t understand God, prayer, religion, and the purpose of man. And he cannot make sense out of this paradigm. So he falls further into misguidance, like a schoolboy who misses the primary instructions only to reject the class entirely.

Then I don't really see how God's answer to losing a leg (or any such calamity) doesn't boil down to "literally just deal with it bro." Which is, no doubt, solid advice to someone who needs it.