When it comes to questions like this, there is no definitive answer based on science. It’s more about what feels right for your hair.
If using a pre-shampoo treatment and a light leave in provides enough conditioning for your hair type, then I say skip the rinse out. If you find your doesn’t feel conditioned enough, then you should probably add a rinse out back in to your routine.
Let us know what you find out works best for you – good luck!