If I were the CEO of OpenAI, I'd be pretty pissed if a member of my own board was shitting on the organization she was a member of while puffing up a competitor. But the tone of that paper makes me think that the schism must go back much earlier (other reporting said things really started to split a year ago when ChatGPT was first released), and it sounds to me like Toner was needling because she was pissed with the direction OpenAI was headed.
I'm thinking of a good previous comment I read when the whole Timnit Gebru situation at Google blew up and the Ethical AI team at Google was disbanded. The basic argument was on some of the inherent incompatibilities between an "academic ombudsman" mindset, and a "corporate growth" mindset. I'm not saying which one was "right" in this situation given OpenAI's frankenstein org structure, but just that this kind of conflict was probably inevitable.