This was clearer in, say, Shakespeare's day, when "pray" is commonly used by a person making a request:
"I pray you, do not fall in love with me, for I am falser than vows made in wine."
You posted the xtra word that makes all the difference...You or thee...I pray thee, or you...That's a request...Whey you pray (to), it is worship...
James 5:16 "Therefore, pray for one another, that you may be healed. The fervent prayer of a righteous person is very powerful."
Do you think prayer gets LESS powerful when the righteous person is in heaven?