If you have ever seen a porn movie being shot you would see just how fake and boring it can be. It seems hot, but in reality it is often just a couple of bored people going through the motions and they edit it together to look hot. Live web sex cams are totally different because these are real people having real sex and doing real things.
These are amateur babes getting naked and naughty on their cams because they love to do it, not because it is their job. It all happens live as you watch it so when she drills her pussy with a toy and cums like crazy you know it is happening because she is lost in the moment and loving it. That live moment is why live cams are so much better than porn movies.