I know all of this, because we already had an elaborate discussion in another thread, in which you also participated. For a refresher, read @Slak_Jaw’s post and the subsequent discussion.
So, it IS a cumbersome process if you already have all your audio files organized in a folder structure. And, even if you flatten your audio file folder to one big folder, the relinking takes quite some time if you have a lot of files.
All of this shouldn’t be necessary. In the absence of a proper synchronization mechanism, they should at least make the relinking on iOS easier by implementing recursive import or some path mapping feature as suggested in these threads: