Dialogue presupposes respect for each other. The correction, as a correction, does not show the respect a theologian should show to the Pope. A correction declares what is right, thus usurping the full supreme universal teaching authority of the Pope.

I don't particularly like those strictures, but they are laid out the cdf's instruction on the vocation of theologians. If you want dialogue, that is the way to do it. Correcting the Pope is not.