Even if you already have a PhD and tenure, many academic papers are collaborations, and so if the top relevant journals aren't open-access then you need to publ

Even if you already have a PhD and tenure, many academic papers are collaborations, and so if the top relevant journals aren't open-access then you need to publish there if one of your co-authors needs a PhD, tenure, etc. Given that much research involves at least one PhD student, it's very hard to move out of the system. (My personal policy has been to avoid submitting to closed-access venues, but accept it if my coauthors needed it. However, I don't do reviews for these venues.)