The reality is that yes they are “against fuselage” seats which almost always means a window, but due to aircraft design, has a small chance of being up against a solid wall. They are saying that “window seat” is a descriptive term but not a guarantee because of this. I’m sure that in most cases where this has ever caused real concern, flight crews were able to reseat people to adjust or airlines compensated the aggrieved flyers or I don’t know people fucking sucked it up and moved on with their lives.