The most recent Pulitzer Prize winner for journalism (Glenn Greenwald) says journalism is an "adversarial" process. However, adversarial is by nature a two way street. Journalists who go digging into the lives of people and businesses need to be prepared for adversarial response.
If I'm a business owner that's being investigated by a journalist, I want to find out the who, what, where, when and why.
I am entitled to investigate the people who are investigating me.
journalism startups are businesses. they make money by investigating businesses like uber. Uber is entitled to investigate in return
this is silly, the comparison to bloodletters was made to undercut the assertion that people's experience is a reasonable way to evaluate ideas, but human beings rely on experience at all times to evaluate. You're trying to justify his analogy by using it in a different way than he intended.
It seems to be a fairly common experience in different professions that certain people are better than others. I guess you'd disagree that Einstein didn't stand head and shoulders above others in physics? Need I insult you by mentioning the big names in computer science? and other fields.
Going back to bloodletting, if you insist on using it in a different way than GB intended in his trollish response, I'm sure you know the whole profession has been discredited, therefore it's not really logical to look for a practitioner from a contemporary point of view who stood head and shoulders above his peers.