They're position basically boils down to "Facebook won't tell us what problems were identified with the domains that caused the blocks, but it's better to have guards against malicious domains than not". That is a false dichotomy.
A better response is, "unless Facebook is actually disclosing what issues with the domains caused the flagging, we should not allow them to block news websites, especially when they've been critical of Facebook". To do otherwise is basically just giving them carte blanche to block domains whenever they want to, and assuming on their behalf that they're being honest and benevolent.
They go on to make excuses for Meta all throughout the article:
Whatever issue Facebook flagged regarding those ads — Kendall is not clear, and I suspect that is because Facebook is not clear either
While this interpretation of a deliberate effort by Facebook to silence critical reporting is kind of understandable, given its poor communication and the lack of adequate followup, it hardly strikes me as realistic.
For an even simpler example, consider how someone forgetting a password for their account looks exactly the same as someone trying to break into it. On any website worth its salt, you will be slowed down or prevented from trying more than some small number of password attempts, even if you are the actual account owner. This is common security behaviour; Meta’s is merely more advanced.
As someone who works in security, this is actually a hilarious indictment of how inadvanced Facebook's security would have to be to be mistaking actual organic shares and reposts with malicious boosting attempts, and once again is assuming innocence on their behalf where no assumption of innocence is warranted.
Even their sarcastic line,
If you wanted to make a kind-of-lame modern conspiracy movie
is an unwarranted dismissal of assertions that Meta polices political content on their platforms as being akin to a conspiracy, even though we in fact know they do that. Reporting has shown that Meta does actively take political stances and translate those into actions and policies in their sites.
Hanlon's Razor is about assumptions sans evidence, because of the natural human tendency to automatically interpret actions that harm you as intentional. It's not, however, meant to discount evidence of patterns of malicious behavior by actors known to be problematic.
And this is not a new, one-off behavior on Facebook's part: