There is definitely such a thing as jobs that take lots of book learning and tests to get, and jobs anyone can get by applying for them. This semantic fight of "No such thing as unskilled labor" is just going to make people call it something new and politically correct, but it won't change reality.

If you can master it in a week it isn't a skill. You are redefining the word to make it so broad it is useless to make some ideological point. Also given what I see with Amazon boxes I doubt they can in fact pack better than I can.

Skilled labor is something that you need outside training in order to do.

When someone is an 'unskilled worker,' it means they're only eligible for positions that train them.

The only, truly, skilled labor.

Have you ever received an Amazon package? They are not masters of Tetris