Is There a Way to Turn Off All Image Alt Tags for a Course?

I know you can turn off image alt tags by object, but can you turn them off for an entire course? I met with someone who uses a JAWS reader and for some courses having all image alt tags get in the way of learning. For example, let's say I create an animation that looks like a piece of paper going through a fax machine. For the images I have a picture of the fax machine with a piece of paper over that, and a duplicate image of the fax machine on top that's cropped so I animate the paper to slide through the 2 fax machine images.

Instead of having image alt tags for all 3 items, one alt tag to represent all three is more useful. If I have to do this through my entire course, it's very time consuming. Is it possible to turn them all off at once, or do I have to do this for everyone?

If it's not possible, I think this would be a good feature to add.