Because of India
India is the second largest Mobil Market Worldwide.
Oh and Xiaomi is banned to use any chipset other than Qualcomm snapdragon in India because of patent issues with Ericsson.
Qualcomm had obtained a licence from the Swedish company for their patented technology. So there are no problems with Qualcomm Chipsets in India.
Waiting for the Redmi Note 4 Pro hehe