So we benefit from all sorts of systems, lists, meditative formulas, many of them quite different from one another, but all of them arising from the particular vision or realization of one being. Some of them are very clear and useful to many people over a long period of time; others appeal to a narrow segment of human beings who seem to do particularly well with it, while others find it incomprehensible and weird! And it's one of the great wonders of this work that it can be articulated in new, fresh ways that speak to people exactly where they are.
In the past, in the eastern cultures where Dharma was first taught, much of what was articulated (and later, written) came from beings (primarily male) who were predominately monastic and who spoke to others who were living in the same situation. They were fully supported, they were protected from a lot of the stresses that bedevil our poor selves, (while no doubt having other difficulties that we do not). So when we look at their ways of articulating an orderly process of unfoldment, we are left scratching our heads and wondering "where do I fit into this? How does this express the reality that I'm living?"
For example, the Sixteen Stages of Insight, are really useful if one happens to be in retreat practicing strict, formal meditation on the Four Foundations of Mindfulness for two or three years. It's not such a useful tool if you're practicing for a week or a month and it's an almost-completely-beside-the-point tool for someone who's getting up every morning, helping a family get out of the house on time, getting to work, taking care of business and maybe having a brief, sleepy dialogue with their meditation cushion before they go to bed!