All sailors sew! Eventually some of them acquired such wonderful skills to be able to even decorate canvases.
The reason sailors can sew is that sails needed to be repaired very often. The strong wind and the storm would tear them to pieces.
Now to repair a sail you need a special kit, not just a needle and a thread. As you can see, even those who go out sailing, nowadays, have their own special kit and know how to fix the sail.