I totally get your point but I cannot agree with your labelling of the phenomenon. This is not hypocrisy at all and those who research and write about subjects they’ve not experienced personally are not hypocrites.
A hypocrite is either: a person who puts on a false appearance of virtue or religion (see Molière’s play Tartuffe for a classic case) OR a person who acts in contradiction to his or her stated beliefs or feelings.
In the world of online writing, therefore, a hypocrite would be someone who writes passionately about, say, living without plastic but in fact buys and uses plastic items all the time in their own life. Or someone who writes articles advocating monogamy while having wild affairs. Or someone who runs a vegetarian cooking blog while eating meat.
I would agree that someone who writes from direct, personal experience will write with more authority and authenticity, and that’s usually a good thing, but those who write from research and interviews (journalists, for example!) are certainly not hypocrites. I recommend closer consultation of your dictionary.