We draw the line at everything is art when viewed from the perspective of art.

It is like asking when a coffee cup becomes a jerry can, or vice versa, and the answer is always: it depends on how it's used.

It's not that you don't get it, it's that it means something different, possibly nothing, to you than to others. It's only a problem if you want to appreciate it from the same perspective as others.

Art is in the eye of the buyer. If the buyer thinks it's art then it is art.