You think that if Allah sent a revelation, it would have to be something completely inhuman and strange to us?
Allah's revelation has practical benefit for us, so many times it relates to the common problems and challenges of human life. That it speaks to human issues does not mean that it cannot be from a Divine Source. This because, yes, the Creator of the Universe cares about humans, and in fact created humans as the central purpose of it all - so that through our awareness of His creation we can become aware of Him.
But, the Creator of all this also has His affairs and knowledge which are completely beyond are comprehension. And so naturally, in the Qur'an you will find the human issues addressed side by side with cosmic affairs that nobody but Allah and whoever else He wills understands.