Regardless of their quality, because the actual IT generation wants to earn money with tools they got for free (beer), while other professions people do pay for their tools.
You seem to feel strongly enough about this to repeat it nearly word-for-word in multiple comments. Trust me, every profession wants to pay less for its tools. And no one, in IT or out, is choosing their tools "regardless of quality".
This is why most companies selling such software tools have switched their basic versions from "trial during X days/trial license" to free (beer), while trying to seduce developers to eventually pay for the full version.