That makes it even better for not going through the trouble of taking them apart,....imho.
When they are not glued, the biggest problem is when the bottom bars are attached to the top bars of the frames underneath by burr comb when trying to pry frames loose and pull them up. Not always a real big issue, but it does happen. Especially when a good nectar flow has gotten ahead of the beekeeper's ability to put honey supers on.