"...and a voice came out of heaven..." Luke 3:22
Prayer is not a good idea. It is God's idea. The Father initiated communication with His Son, right after His act of obedience.
Through His Son, the Father offers prayer to His children.
He desires to maintain consistent communication with them.
Prayer is a child-like embrace of the Father. Prayerlessness is childish, & it stiff-arms the work of His Spirit.