Shareware tends to combine the worst of commercial software with the worst of free software.
I'm generally a very pragmatic person: that which works, works.
Artists usually don't make all that much money, and they often keep their artistic hobby despite the money rather than due to it.
I do get my pizzas paid for by Linux indirectly.
Programmers are in the enviable position of not only getting to do what they want to, but because the end result is so important they get paid to do it. There are other professions like that, but not that many.
In many cases, the user interface to a program is the most important part for a commercial company: whether the programs works correctly or not seems to be secondary.
Before the commercial ventures, Linux tended to be rather hard to set up, because most of the developers were motivated mainly by their own interests.
When it comes to software, I much prefer free software, because I have very seldom seen a program that has worked well enough for my needs, and having sources available can be a life-saver.
Linux has definitely made a lot of sense even in a purely materialistic sense.
I very seldom worry about other systems. I concentrate pretty fully on just making Linux the best I can.