Pruning Palms is not absolutely necessary. Somehow, before humans and their pruners and saws arrived, palms lived for millions of years on the planet.
Good palm tree care can mean AVOIDING removing most of the leaves (fronds) yearly or more frequently because it may weaken the palm and slows its growth.
Mature fronds provide food for developing fronds, flowers, fruit, roots and storage reserves in the palm's trunk. When healthy green fronds are pruned, the nutrients they would have produced are lost to the rest of the tree. Some nutrients move from older leaves of palms to newer leaves as they die. Removal of older green or chlorotic leaves exacerbates nutrient deficiency. Nutrient deficiencies retards growth.
When pruning, take care to leave at least two rows of mature fronds (those that have turned greenish-yellow or muted green), preferably more.
Never prune off more of the palm's leaves in one year than are produced during that time. Simply put, do not remove a palm tree frond until it has completely died (turned totally to brown).
