I figured as much rather than it being an oversight given your professions! It’s an interesting choice as it seems “unfinished” to my eye, which could be just because that’s the way it is typically done. Great job on the project as a whole!

Are you planning to edge band the unfinished plywood edges? I imagine it could be a design choice to keep it as is, but if you want to give the custom wood work a bit more of a finished look edgebanding is super easy and cheap. You’d only need to buy the banding and use an iron and razor blade.