Actually it does address in a less than ideal way one real world issue, it allows for easy browsing of samples and import without losing access to the playback controls (Which you would if you left the dialog on the right hand side) or the file list (If the dialog was overlapping on the left). This can be beneficial when searching through tons of files in multiple directories, for example if I am doing SFX for a film or animation, my library of sounds is somewhere around 40,000 files.
Now it is a less than ideal way because there still wouldn’t be a good solution for searching based on file metadata (ie. many of my SFX use text descriptions in the B-EXT chunk IIRC) or filename very easily, though to be honest I am not sure those would be difficult to add, if I ever had free time I might look at it myself. It also doesn’t allow for arbitrary categorization needed for loops/musical samples/etc. to be truly effective which is what software like Logic does. That would probably be more difficult to do well.
But it could be a start at least.