Is it unethical to access journal articles from Torrent websites? Getting access to journal articles can be quite expensive, in particular for those not affiliated with some University (even then, it's still expensive, it's just the uni paying the cost...).

A question asked on this site Why are most scientific articles locked behind a paywall?
ponders why this is so. The answer is not convincing at all, it essentially says "that's just the way it is, pay up".

Well, if that is the way it is gonna by, then I am just going to torrent-download the articles. How could this possibly be unethical, if you guys yourselves, for no good reason and for the detriment of scientific inquiry, help support the monopoly that these journals have?
Ethics is (by definition) personal or at least culture-dependent.

Personally, I think it is unethical to have publicly funded research results behind a paywall. That would make the answer to your question: No, it is not unethical to use websites like sci-hub. But that's just me and others may disagree.