Yes, technically true. You can do some stuff there, but it is somewhat limited. I said I was simplifying some details, this is one of them. It only adds to the confusion. I don't think many people use it. At least not for any really complex use cases (I may be wrong, but that is the extent of my knowledge).
Looking at this I don't see how it can do too much interesting stuff: https://en.bitcoin.it/wiki/Script