[stonecolddevin]

They're hyperbolic and don't actually give you any useful information on why they're "harmful" or what's wrong with the subject being discussed.

[ahachete]

That they are hyperbolic, maybe. I disagree with the rest, I believe there are tons of information on both examples about why they are harmful.

(edit, typo)

[detaro]

Not in the titles. "X is harmful" could instead be "X is unsafe", "X is often slow", "X has non-obvious corner cases", "X led us to maintenance hell", ...

"Harmful" is less information and kind of suggests an overall judgement for all cases vs "things to consider" (which was e.g. also a criticism of the original letter, that it lead to rules like "never use goto" which forced people to do bad workarounds instead of discussion on where to use it and where not)

[smsm42]

You mean, you actually have to read the article?