How dare they act in a self-interested manner with no other regards.
It doesn't need to be a false dichotomy between what it is now and stalinist Russia comunism.
Note: the blood suckers is not the whole of the capital market of course, they produce value. The problem is some players and some practices..
Giving things way to people for less than they are worth may not be good idea, but I don't think I would call that parasitic.
Instead, that is closer to charity.
I would not use the word "parasitic" to describe a situation where good and services are very cheap and good.
The point of the article is that it is this Kool-Aid thinking which deforms actual capitalism.