That's a mischaracterization. That was not the attitude of the product manager. In fact, the manager sincerely apologized to one of the publishers for the trouble caused by the suspension and the associated vague email.
The manager and all of the Googlers who took turns speaking were enthusiastic about sharing tips but more importantly they encouraged the publishers to interrupt them to ask questions or provide feedback. They were listening. This made the Learn with AdSense event more useful for publishers because we got to air our doubts and concerns and receive good answers.
The exchange happened in a Q&A where several publishers raised the issue of vague suspension notices that do not give useful indications of what caused the suspension. The product manager was under the impression that the amount of publishers this happens to was a "vanishingly small amount" and he was clearly startled and troubled to see so many hands go up.
As someone in this discussion mentioned, Google should know that a publisher is legit and have an alternate method of communication that is friendlier and clearer. The product manager acknowledged this was a problem but only after he backtracked from defending the practice after several publishers in the audience pushed back, insisting that Google needs to be more forthcoming.
There was nothing flippant in that Googler's attitude toward publishers. Google deserves praise for hosting these events because it is a positive step for them to dialogue with us to hear our side of the story. It is heartening that Google cares enough about publishers to even host these events. It's a positive signal from Google.