Everything can be seen from almost infinite number of angles and perspectives. If you want to understand something like Samkhya, you will have to see beyond it’s outward shell. All of the understanding of samkhya has not arisen as a by product of philosophy, but out of direct insight into the inner workings of one’s own system. To try and preserve this understanding, those sages started speaking about it, and samkhya is just an expression of something else which is far deeper. It is simply an intellectual model. And like all intellectual models, philosophical or scientific, it doesn’t matter - they are incapable of transmitting the Truth, they can only offer an interpretation of existence. If you want to understand Samkhya as a philosophy, then remain with the sutras, scriptures, and book learning. But if you want to understand Samkhya as a useful model to assist you towards understanding your own inner workings, you will have to use it just as one uses a staff in the darkness. Once you gather a sense of your own system and the light starts arising, you can throw it aside immediately.
If you say that prakriti and purusha are distinct, in some ways they are and in some ways they are not. If you say that prakriti and purusha are not distinct, in some ways they are and in some ways they are not. The very idea of the dual and the non-dual are inseparable, and if one falls away from your mental vision, the other has immediately collapsed with it. If one rears it’s head, then too the other rears it’s head. These are the workings of the intellect, which seeks to divide everything into polar opposites. That is it’s basic function, to divide amongst the senses.
Samkhya is bound to be flawed, just as any philosophy is bound to be flawed, simply because it is to fit the whole existence into the small boundaries of one’s thought. But certainly, it is tremendously useful as a model for inquiring into oneself.