To discover the answer to your question one only need travel beyond the words. There... lurking in the shadows of the words is the antecedent to all works of religion.

Not God or personal growth. Nor the concept of a afterlife although it is a factor. The antecedent is about power.

Power over the other at the cost of shame or incremental fear or vanquishing by others and worse, A cruel death.

Man wrote the words. Forget the so called word of God . God doesn't speak our or their language. Not really. Man does. And man being who he is had less than selfless motives.

Why praise God you ask? Because man says so. And so by doing you get immediate benefits wrapped in less fear. For the moment. Then you must return to the praising moment each week to refuel the need to avoid fear et al. There the power and authority incrementally takes its share and more if you are willing to give it. A generational feeding of the small minds with heuristics that mold and twist the small of minds into believing practically anything including supernatural, cosmic notions that in a moment are converted to articles of faith.

Why praise God you ask? Because like in all small minds, what comes easiest is always the best choice ala to knell is easy to stand your ground is courageous. But why God and not a inanimate object or a cloud or a pet golden retriever? Because those in the know and authority say so. As small minds remain ever small when abdication comes easy, hence the herd. Thus the shepherd. Our species is prone for both the greed and fecklessness. Hence the religion and thus the God that demands his rightful place, to be praised. Or...