Prof. Ramkrishna Bhattacharya addresses a similar issues (why studying Ancient Indian Philosophy) in a recent paper, here. He starts with the constatation that “it is there” (like the Everest’s being there should be enough to make one wish to climb it). He then adds that ancient philosophers like Thales or the Cārvākas were the first natural scientists since they addressed the question of what there is without recurring to myth. In this sense, modern scientists only demonstrated experimentally what these thinkers had already intuited. Moreover, in some significant cases, such as dialectics, a few thinkers only developed the field significantly in a way which is relevant even for today’s philosophy. He then concludes:
This is why ancient philosophy has much to teach us even today, for much of it was grounded in sound theoretical thought.
Do you agree? I, for one, would add that what appears to me as in need of an explanation is rather the fact of not studying the history of philosophy. Would you ever focus on the philosophy written in Polish between 1550 and 1580 only? If not, why would you want to focus on Anglophone philosophy of the last thirty years at best?