Ok, fair enough theyre not entirely opposed to outsiders setting up research institutes like theirs and enjoy debate (or the optics of debate) more than most, and I don't think most of them are insincere. But the point wasn't that they were exclusionary, but more that whilst priding themselves on their supposedly superior ability to predict the future and "align" AIs, they somehow missed the value drift and human non-alignment with their values basically any outsider saw coming...
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