It seems to me, from the exposure to texts so far(albeit not that much), that all yogis must atleast penetrate the role of kamma in taking a new life and having taken a new life, help in maintaining that life.
But I wouldn’t worry too much about theoretical philosophy, ‘ñāṇa’ by it’s own nature, own power is capable of such knowledge at the right stage of development.
PS: but of course, pariyatti is the root of the sasana.