One of the things discussed in here recently about comics writing is the importance of not having a character do multiple actions per panel. BUT this is not as far as it goes:
Sometimes you want to have an action or gesture or reaction over multiple panels. Because timing is IMPORTANT.
Also, think about something like the manga Blame!
It has pages and pages of the main character going through the endless city, and if you just cut to the action or dialogue it would be 10% of the length, but the story is about the city itself, ever expanding.
Those vistas are incredibly important.