Be less hard-headed then. I didn't say 'look at this', I said 'study it'. This means, download the file, open it up in your paint program, zoom, study the shades, the dithers, the highlights, the aa and everything that goes into Made's choices. Ask yourself questions about the art. 'Why did Made do this here?' Justify choices in different ways. Find out if you agree with them, if yes, cool, add them to your skills, if not, great, you know what not to do. Nobody ever would call styding a piece by Made a waste of 10 minutes, for christ's sake.
I don't think that just looking at skin tones really helps you get a feel for chosing the right colors.
It's not the only way, but I feel studying art you like, as well as reality is a great way to memorize and codify the processes that you then use in your own art. If this doesn't work for you, and you say you don't grasp colour selection when people explain it to you either... I don't know what will help. Perhaps you shouldn't be so certain study and practise doesn't work, and you should do much, much more of them before you throw your hands up in despair?