Moreover, now that they've started the arms race, they can't stop. There's too many other companies joining in, and I don't think it's plausible they'll all hold to a truce even if OpenAI wants to.
I assume you've read Scott Alexander's taken on this? https://astralcodexten.substack.com/p/openais-planning-for-a...
Scott's Exxon analogy is almost too bleak to really believe. I hope OpenAI is just ignorant and not intentionally evil.