You're right! The poster did say that. Some might mark a distinction between "there is no bubble" and "this author's predictions of when there is a bubble are

You're right! The poster did say that. Some might mark a distinction between "there is no bubble" and "this author's predictions of when there is a bubble are not reliable or trustworthy". The former is a pretty strong claim, requiring precisely the sort of clear and specific evidence you have wisely and correctly called for. The latter point suggests that the author should not be taken as authoritative and the evidence they present for their argument is not to be taken seriously. As a side effect, this means that the question at hand - bubble or not - remains unaddressed.