They heave the ball up from 22 feet away, however, better than players who can probably bench press 100 more pounds than they do. That's because they shoot with their knees. Your legs are much stronger than your arms. Your arms, all the way down to the tips of your fingers, are involved in aiming the ball toward the rim. The less power your arms exert, the more precision you get.
Guitarists wear shoulder straps for the same reason.
By bending your knees and thrusting upward, you provide all the thrust that the ball needs to reach the basket. Let your arms be the guidance system.