Why is downloading torrents considered piracy?

[CrIstI]

I meen.. I can't affort buying games with real money,do to the fact that they are expensive,and by the fact that I live in a god forgoten country.So I downloaded RX,civ 5.. and other games,but when I go to their forums and say that I got the game from torrents,they all bann me,saying that this is piracy,so why is torrent considered piracy?don't you get the game legaly and legaly creating a torrent out of it? and then legaly putting it on a legal torrent site?