While that may be true (though doesn't necessarily mean the same journos aren't making that complaint about their own craft) it doesn't answer the complaint in any meaningful way.
Last time I checked the purpose of a business was to make money, when I see an easy way to do things I take it.
It's the smart thing to do. I have a feeling that if Instagram pivoted towards curing cancer that investors would go ape shit.
Likewise if someone put a billion dollars on the table and told me I could have it either by writing a photosharing iphone app or curing cancer, I'd sure as hell sign up for option a and not option b.