To be fair, the comparison to horoscopes was in a very specific context: the results are presented in general terms that people will be more likely to self-identify with. That particular excerpt doesn't really say much about the predictive power of MBTIs, aside from pointing to a study that suggests that the predictive power doesn't really matter when individuals assess their own results.

Of course other parts of the article talk about the predictive power of the personality test. On the other hand, those excerpts don't talk about horoscopes.