This is why, the WSJ says:
https://www.msn.com/en-us/money/companies/openai-s-path-ahea..."One surprise signee was Ilya Sutskever, the company’s chief scientist and one of the members of the four-person board that voted to oust Altman. On Monday morning, Sutskever said he deeply regretted his participation in the board’s action. “I will do everything I can to reunite the company,” he posted on X.
Sutskever flipped his position following intense deliberations with OpenAI employees as well as an emotionally charged conversation with Brockman’s wife, Anna Brockman, at the company’s offices, during which she cried and pleaded with him to change his mind, according to people familiar with the matter."