The whole notion of 'pontifical secret' smacks of the underhand and abusive exercise of power and control...not just of those being investigated but also of the thinking of those who might be influenced. (Something Our Lord never did!) Talk about 'quenching the Holy Spirit'! 
Yes, there is a danger that the person may have got something wrong .. it will hardly be the first time; the Church is still living with some decidedly dubious theology and doctrine. 
Are we really so afraid that the God who is Love, and who has chosen to relate intimately with us, will really breathe hell-fire and brimstone because we got something wrong? If that is the case, then there is no hope for the Church! Pretending that all our thoughts are always 100% 'squeaky clean' and theologically accurate (from God's perspective) is not only gross denial of reality but is sheer arrogance.
Far better to have open discussion and prayerful exploration of the issues raised .. hopefully this is now possible.