It goes both ways, though. Publishing in a journal means inheriting some of its prestige, but also means giving it some of your prestige. Do we want journals that are currently bad to be able to claim to have published papers by high-status rationalists, if those papers are going to be major outliers in quality?
I disagree, for the reason Gerard explains, and because SIAI can be selective about which journals it publishes in.
But I am not sure why your comment was downvoted. It seems fair to ask the question.
Recently, I gave some reasons for SIAI to begin publishing in mainstream journals, and outlined how it could be done.
I've recently been made aware of some pretty good reasons for SIAI to not publish in mainstream journals, so here they are: