He may have made it complicated but I think what he said was quite valid! 10/10 or 100% is the best you can possibly get so if you give anything a perfect score you aren't leaving any room for whatever you'll hear later which might be better. Well some people start giving 11/10 & higher but for me a score like that is invalid. 10/10 should be a perfect album where every track is a masterpiece, stands out & doesn't get any less amazing with time. No album for me can achieve this. Some come close but no album would I call 100% perfect!