That’s perfectly fair! I always seem to have a 50/50 coin toss of whether there will be a folder inside the archive or not.
I think if things were more consistent for what I end up having, I wouldn’t mind it if archives didn’t have a folder or if they always had a folder, rather than the current state.
I suppose in your case, it would be cool if there were a config option to make this do the reverse, unpack the files within the subdirectory of the archive to your current directory.