I challenge anyone to prove that prayer works.
I contend that it is just another form of enslaving the masses into obedience.
I contend that prayer is actually destructive. It causes people to believe in a fantasy and not properly address the problem at hand. It creates false hope.
First of all, as someone that was raised and taught in the king's church or the Church of England, I know that people are using prayer incorrectly
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According to the bible, one cannot pray to ask for things, they shall not be granted.

James 4:3 says not to pray for things

English Standard Version
"You ask and do not receive, because you ask wrongly, to spend it on your passions".

You shouldn't pray just to be seen.

Mathew 6.5 says not to pay in public.

English Standard Version
“And when you pray, you must not be like the hypocrites. For they love to stand and pray in the synagogues and at the street corners, that they may be seen by others. Truly, I say to you, they have received their reward."