There are many reasons to simulate traditional processes, rather than actually print with the traditional process itself.

Firstly, not everyone has access to the materials required for many of the processes, and many alternative processes use chemicals that can be quite unpleasant to work with and at times unsafe. Of course it's often quite possible to work safely with most of the chemicals involved in most alternative processes, however this can be a concern for many people.

Further, it can take significant time to develop the skills required to make high quality prints with alternative processes - there are 6 month fill time courses on alternative processes on offer, it is not exactly something you can master in a few hours. Good digital technique takes just as long to develop as good analogue technique, but I would presume that most of the people reading this article are already quite good with digital imaging and comfortable with the use of ICC profiles.

Use of these techniques allows you to: