True. I love how many people make up absolute rules for winning teams. Like it's a simple equation and we just aren't plugging the numbers in. The truth is, it is impossible to generalize every winning team with statements like "no good teams trade good players", or "the key to winning is a good left tackle" If statements like this were true all tackles would be the first thing off the board.
The bottom line is that this is not an exact science. The trade might work out and it might not. There is no way of pre-determining this with a set group of rules