There is a pretty good argument to be made that asking someone to imagine walking in these scenes and click on areas of interest/concern is at least a partial proxy for where they will actually look when placed in that context. It is not reasonable to wholesale dismiss studies and their results simply because you think they could have operationalized their hypothesis differently or better. These undergrads did a pretty respectable job within the scientific resources at their disposal, and have presented a real result; now science must grapple with what that result is telling us and why these differences occurred. Moreover, one could argue that to your point, if clicking is not actually looking then why is there a difference at all? It's just clicking on a picture right?