So you find little or no usefulness in the 3 stage prajñā of Literary, leading to Contemplative leading to Real Mark prajñā?
Well, your first category is misleading, śruthih means "hearing" and "listening". It does not mean studying books. To whom should we listen? A person qualified to give teachings. The prajñā that results is called "śrutamayī prajñā". Without this vital step, no amount of reading books will awakening the prajñā of the path.
Then we have the prajñā that comes from reflection, cintā-mayī prajñā. In my estimation, reading may constitute a part of this prajñā.
Then finally, you have bhāvanā-mayī prajñā, the prajñā born of practice.
But the exercise by some to become expert in the tenet systems of this or that ancient Abidharma schools, for example, or to become expert in pramāṇa, and so on, completely misses the mark of Dharma practice and realization.
I don't say these things idly. I say these things because I observe many people over the years, westerners as well as so called Geshes, Lamas, Khenpos and so on, who, while being quite expert in myriad ancient opinions about this and that fine point of Buddhist philosophy, nevertheless never succeed in integrating the meaning of the Dharma into their personal life. And so for these people, Dharma remains a religion and a culture, rather than a personal experience.