OpenAI is one of many AI companies. A board coup which sacrifices one company's value due to a few individuals' perception of the common good is reckless and speaks to their delusions of grandeur.
Removing one individual from one company in a competitive industry is not a broad enough stroke if the threat to humanity truly exists.
Regulators across nations would need to firewall this threat on a macro level across all AI companies, not just internally at OpenAI.
If an AI threat to humanity is even actionable today. That's a heavy decision for elected representatives, not corporate boards.
[0] https://twitter.com/ilyasut/status/1491554478243258368?lang=...