Why should we pray to God, do you pray to your parents or your grandparents when you can see them but when you cant see god ..........
Okay next analogy: lets say I create an artificially intelligent robot and put it in a building with only walls and no windows, seal the doors. Now robot is activated inside the building and there is no human in it, he thinks
well I am here so there must be some creator who created me and my universe(i.e the building on our case), so should he be praying to me, for him I am creator though he hasnt seen me
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You may say that "You are not god, he should pray to the real god."
But how would he know that his creator is not the super duper powerful entity called god but some human who himself has been created by someone else. Same ways why it is not possible that entity that created this universe was not created from some other power/source/intelligent specie.