I mean, I think many of us are curious and enjoy hearing more details about how and where bugs like this occur. What's wrong with that?
There is nothing wrong with that, and nobody is saying there is. In fact, it is exactly what is being requested here!
I'd love to read a proper technical post-mortem, but this obviously isn't it. It's a carefully-worded statement from a lawyer meant to minimize liability and reputational damage to the company.