Earlier quoted context omitted.
It's possible you're reading too much into that comment. The GP may simply have been providing a PSA about where they have found useful information given that one potential source has been removed. From HN community guidelines on reading into a comment: "Please respond to the strongest plausible interpretation of what someone says, not a weaker one that's easier to criticize. Assume good faith."
I think the "reputable" word is what gave the commenter away.
If one store goes out of business and I say "Here are two store that I consider reputable for buying the same things", that really doesn't mean I think the original store was not reputable.
The comment does not at all read to me as justification for the ban one way or another. It is a simple statement that there are sources the commenter trusts on the topic, with a referral to them.