You can't take any statement like this remotely seriously. We live in a world where NSA officials can testify before congress that they don't "collect" data, because that's true under some baroque definition of "collect" that they invented and didn't tell anyone else about.

Similarly you have no idea what definition OpenAI intend for terms such as "specific user data", "accessed" etc. And we have no idea what non-excluded possibilities actually did happen that they simply omit from their statement.

In practice OpenAI and many others have created a situation where they're actually unable to make any credible denial of anything really.