How structural are the plywood panels in cabinets?

Had to remove a small cabinet in my toy hauler. It was thin luan plywood stapled and glued together. Very small framing.
The cabinets hanging from the walls are the same thing with some type of faux wood doors.

They put enough glue on them that they would split and break trying to get them apart. No way could I have put a panel back on if I needed to. This is on a Forest River work n play trailer.