Infinite Love will never give a stone when bread is asked for, or a scorpion in place of an egg. Prayer is compared in the Bible to incense. Incense was very expensive, blended by a perfumer according to a strict formula. It appears to serve no particularly useful purpose. Its smoke and fragrance soon dissipate.
Prayer is like incense.
It costs a great deal. It soon dissipates. But God likes the smell. It was God's idea to arrange the work of the tabernacle to include a special altar for incense. We can be pretty sure he included all that was necessary and nothing that was unnecessary.