Why does 3dmax have to take a camera? What does a big camera do?

In 3DMAX, as long as you draw, you need a camera, whether it is animation or not.

Maybe you want to ask, you can render a picture without a camera. But when you think an angle is good and the painting is beautiful, and at this time you have to change the angle if you want to modify other models, the angle just now is gone. But if I shoot the camera at that angle, then I can go back to that angle quickly.