Earlier quoted context omitted.
You are, there is no maybe about it. The plain English meaning of 'it was submitted for our comment' is not 'everyone is required to comment on every story'. That's just a misinterpretation of your own.
The plain English meaning of 'it was submitted for our comment' is not 'everyone is required to comment on every story'. In the context of how it was used, that was absolutely the implication. Tptacek submitted that as the rationale to explain his commenting, when he (obviously) could have easily skipped the whole thread. Ultimately there was no real reason for him to bother commenting in the first place...
Then you come along and want to interpret that reply to actually mean 'Everything permitted on HN is compulsory'. That is, at a polite minimum, pointedly silly.