No it’s a Hollywood thing so they can have a full facial expression for finding the thing they looked for on camera. They need the eyes on camera.

As soon as you find something with binoculars, you won’t take your eyes off of it. Ever been in the savanna finding a lion? Ever been birdwatching and finding this special bird? Looking away or lowering the binoculars means you lost it. Especially when you want to show others, you point and look while keeping your eyes through the binoculars on target.