The reality is that most of the task skills we learn, we forget and then need to learn again. The reality is that all modern careers are strange historically situated ways of doing things, not inherently The Best Way for our minds. Hell screens aren't even good for our eyes and it's not like we've fixed that.
But I am not a fan of scaremongering about this, as if our minds are pristine museums rather than complex and adaptive systems we use in a continually changing and challenging world.
To add to this, I think the idea that possession of tools separates employer from employee is too simple. It's the possession of a privileged place in a *system* that truly separates you from your employer. They have a particular position in regard to regulatory and financial systems, which permits them to employ others and then profit from their labour. Gaining this position usually means having starting capital, at minimum.