I don't think the problem is with having a for-profit wing. The problem is that only the for-profit wing got to use the technology developed by the non-profit, when the non-profit was explicitly tasked with releasing the technology to the public, allowing competition.
I would say you are using the words "explicitly tasked" when the articles of incorporation use the words "seek to" and "when applicable". (And also the "allowing competition" part I don't think is actually in the mix, is there a citation for that?)
""The Founding Agreement was also memorialized, among other places, in OpenAI, Inc.’s December 8, 2015 Certificate of Incorporation, which affirmed that its “resulting technology will benefit the public and the corporation will seek to open source technology for the public benefit when applicable. The corporation is not organized for the private gain of any person.”""
That said, I was only commenting on the idea that creating a for-profit wing was adding to the unusual corporate structure of OpenAI and saying that it really didn't.
