I see two major halves to this.
First: No one cares if InstaSnapWhatsYo goes bankrupt, and if they do, Jan Systrom (founder of ISWY) doesn't make a heartstrings appeal that he's entitled to make money. Live by the market, die by the market, all in the game, y'all, etc. But Lars Ulrich thinks he's _entitled_ to sell 50 million records (emphasis on "sell", as opposed to "give away"), and EMI thinks they're entitled to their cut of the same. So the claims of Ulrich and EMI earn a degree of legitimate skepticism: this thing you're saying is "fair" and "just" in return for your social contribution, we can't help but notice that it's making you very very rich. My point here is that if you're nothing but a mercenary, it's hard to knock you for being a mercenary; if you're claiming social value and also have a vested interest, then this tension gets you some sharp looks. Some of that is legitimate, some of it is just sloppy thinking.
(Aside: imo, this is the same type of sloppy thinking that claims that hypocrisy is a the one true sin; if Dahmer calls Manson a bad person, Dahmer is right, hypocrite or not.)
Second: Science in particular has another problem, and that is the questionable social value of each individual scientist. Read 40 randomly selected peer-reviewed journal publications, and you're going to read a lot of useless garbage. And yet the authors of the garbage are still getting paid, and they might be making above-median wages for an American (not above-median wages for an American with 10 years of education who works 60-hour weeks, but still). I'm a pretty big fan of the net output of science, and academia generally, and think that we should increase our social expenditure on science, but I can see a rational reason for people to be suspicious of requests from scientists to increase science funding.
Sort of accidentally, I note that the entire preceding paragraph also applies to your other example of things that matter, journalism. Every sentence, except the "10 years of education".