All Metal Gear Solid games are hard to play when you first pick them up. It's easy to get spotted, you get killed instantly, and you have to move sooo slow. Luckily, it doesn't take long to game the system and learn how to trick the AI into some pretty ridiculous stuff! Three enemies in front of you? Throw a magazine and all three will turn around and then two will examine the guy you just dropped while you knock them out!
XavierC520 has a much better example as to why distraction is everything in Metal Gear Solid.