You certainly can. A lot of the complaints about that are when the iPad is docked on an ASK requiring a user to reach out to touch the screen which is not very comfortable to do for any stretch of time.
One of the beauties of the ASK design is that it is right against the screen. Not far to reach it at all, perhaps quicker and shorter distance than taking your hand off the ASK and moving to to the side. The only disadvantage I could see is that on the screen, your hand is suspended a few inches from the ASK and weight is not supported.