Holding a rifle, hiking with a heavy pack, loading a torpedo, pulling up an anchor, moving bulky equipment: these all require upper body strength. Whether you're pushing, pulling, or maintaining posture, a strong and healthy upper body is a must.
The number of people who can't raise their arms over their head due to a shoulder injury is unbelievable. Poor bench press form is often the cause of these issues.
Because we need our upper bodies to thrive in this world, it's mandatory that everyone learn how to press to build a resilient upper body.