I totally understand you.
It's kind'a like calling "the place I live in" home. It's just a place. It's just a house. It's just reality. It's just the universe. But it is home, which has a connotation of something more than "just is". Calling reality, universe, totality of all existence, God, is to give it a little bit more poetic and emotional connotation. Or it's like calling my wife "honey" (even though she wasn't produced in a beehive). It's not the definition of the word that's important here, but the underlying meaning of feeling towards it that it relates to. So call the universe, reality, existence, all that is, call it God. I totally understand you.