I'm sure it's not completely useless. If you can manage to get a physics degree you should be able to work in mathematics (applied as compsci or programming type things if your focus was in theoretical physics) or engineering (materials science, chemistry, or systems engineering type things if your focus was on experimental physics)
Physics is valuable intrinsically. A deep knowledge of how the world works is my own definition of the ultimate power. And while currently physics can't offer this, it's the pursuit of this power in the service of humanity that I'm totally behind.