Earlier quoted context omitted.
> The problem with this article is that one does not need capital to start a tech company Yes, one does. One needs tech skills. Those are capital. (You agree with this since you say tech workers get more valuable with age and experience.) They're just not capital in the form of a large pot of cash that can be used to throw money at problems.
Skills are not capital in the communist vocabulary. Skills have an unlimited supply that can not be limited. If you want to mind-bend people into believing skills are capital, then all the workers in the world are bona-fide capitalists, since they are using their skills to get paid.
I have no interest in the communist vocabulary. Communism killed more than a hundred million people in the 20th century. I would hope we have figured out by now that communism doesn't work.
> all the workers in the world are bona-fide capitalists, since they are using their skills to get paid.
In the sense that most of their pay is return on capital, not "labor", yes, that is exactly right.
However, the extent to which workers realize this, and act accordingly, in order to maximize the return on the capital they own (their skills), varies extremely widely.