A part time carpenter is still a carpenter. Evans claim wasn’t that Murdoch is an amateur. His claim was that Murdoch was categorically not involved with VC.
If you write an article titled "Electricians Are Turning Homes Into Firetraps" and then cite the fact that I improperly swapped out an outlet in my home as evidence that I'm an electrician, you should expect pushback.
If it works equally well for Uber or Lyft or WeWork, then trying to shoehorn Theranos in since it's a spectacular fraud that doesn't really fit the definition was a bad decision.
That's rarely a sign of a piece that makes a strong argument.