I agree with the fundamental conclusion that, due to changes in the Internet, CAs are quickly becoming arbiters of what content is valid or not in the public's eyes -- a job they aren't ready for and never asked for. The article linked goes about discussing this issue in a hyperbolic manner and it commits a few critical thinking mistakes despite arriving at a valid conclusion.

Briefly, I'm going to focus on just one of these. I leave it to the reader to spot the others.

Ian Carroll got an Extended Validation (EV) for Stripe in another state to prove that EVs are forge-able. That is, although he followed the guidelines, he believed those guidelines weren't enough to safeguard an EV.

Then when the Certificate Authority (CA) finds out about this and revokes his deliberately misleading EV, Scott Helme writes the article linked accusing and detailing how CAs have too much power, because they can revoke an EV based on arbitrary decisions. He defines arbitrary decisions as "not following the guidelines".

To summarize: Ian Carroll abuses the guidelines to register a deceptive EV to prove that the guidelines aren't enough. Then Scott Helme accuses the CA of not following its own guidelines and of taking an arbitrary decision to revoke Carroll's abusive certificate.

They just can't win.