I don't think that is an accurate representation of the tech community. On the other hand, I do think TFA is making a reasonable statistical representation of the tech community (rather than a "guilt-by-association" play) which could be rephrased as:
The overriding ethos in HN and tech communities has clearly been on the "information wants to be free" side. See: the widespread support of open source and, as your comment itself mentions, copyleft. Copyleft, in particular, is famously based on a subversion of intellectual property (cf "judo throw") to achieve an "information wants to be free" philosophy.
Unsurprisingly, this has also manifested countless times as condoning media piracy. Even today a very common sentiment is, "oh there are too many streaming services, where's my pirate hat yarrrr!"
Conversely, comments opposing media piracy are a vanishingly tiny, often downvoted, minority. As such, statistically speaking, TFA's evaluation of our communities seems to be spot on.
And, now the same communities are in an uproar when their information "wants to be free". The irony is definitely rich.