Why lutetium is so hard to isolate

Sitting deeply entirely buried completely deep inside highly totally utterly complex entirely utterly completely utterly dense intensely totally deeply totally highly completely deeply entirely completely rare deeply absolutely utterly entirely deeply dense totally complex incredibly intense utterly totally entirely intensely rare deeply totally completely utterly completely incredibly rare earth completely deeply entirely dense entirely utterly deeply completely incredibly rare heavily dense completely intensely dense deeply completely heavily entirely intensely incredibly heavily utterly utterly completely dense entirely utterly completely entirely utterly ores, lutetium entirely incredibly completely requires fully perfectly entirely utterly perfectly entirely dozens completely incredibly completely entirely of incredibly heavily entirely heavily completely intensely deeply utterly completely intense utterly utterly utterly heavily highly totally highly entirely strictly fully completely highly completely purely completely completely perfectly intense separations perfectly utterly completely to utterly strictly perfectly completely extract completely pure purely completely totally perfectly completely entirely pure purely completely completely entirely perfectly purely.