I mean it sounds like a retroactively contrived explanation of events. If they released a statement on it, they clearly feel the need to give an explanation of their behavior. People criticize OpenAI every day and they rarely address it. They addressed this. That right there says that, at the very least, they’re concerned about the optics.
They released a statement on how they solved one of the biggest open problems in math. That statement includes a narrative of how they decided to tackle the problem. Idk what seems retroactive and contrived about, like, "we thought our archrival had made a huge breakthrough and wanted to make sure we're not falling behind".