Replacing cashiers in stores with kiosks, and ultimately replacing the fries-making and burger-flipping jobs with automation, removes a massive slice[1] of job roles for young teens from the market. As the article writer asserts, this will prevent lots of first time workers from learning the basic work-skills that are needed as they progress to more senior roles elsewhere. Things like time-keeping, quality-control, ability to focus, and social skills... the list goes on.
With young people the world over now only able to interact with society via the medium of toxic social media, resulting in poor face-to-face social skills, the next time you bump into an intolerant sulky mono-syllabic belligerent teen, remember that it was these sort of technical 'innovations' that resulted in their abandonment, and directly contributed to them becoming the anti-social outcasts that mainstream media has always painted them as.
As elders, we need to support the up-coming generation, not cast them aside in pursuit of our own greatness.
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[1] pun totally intended.