Sorry Bence I trust the FT journalists to have due diligence w.r.t. what evidence of AR they got from investors (who got it from OpenAI). I completely believe that the company helmed by "not consistently candid" sama bullshits investors about their AR which is the point of this article.
Though I agree with your sentiment that FT is reporting this stuff in a way to stir the pot and create outrage. Speculating about a private company like this is stupid.