We should always expand on these things a little bit.
The Lord calls us to pray. There are many commands in the Scripture to pray.
If we’re prayerless, it may reflect a kind of hyper-Calvinism that says, “God already knows everything He’s going to do, so why do I need to talk to Him about it?” And it misses that God’s whole relationship to us is meant to be a personal relationship. He doesn’t want anything mechanical to enter our minds about who He is or how we relate to Him.
Prayer is this wonderful opportunity for conversation and communication with God, and to neglect that is to neglect what He wants for us and has told us is a blessing for us.