In the days of duns Scotus the argument was that scripture and tradition and teaching of 'church fathers' was that Mary had to be conceived with original sin. It took  few centuries, but then in 1850 the dogma of the Immaculate Conception was proclaimed to be 'revealed doctrine'! Though that revelation seems to have happened way past the Apostolic age.

As you say, 'clearer understanding' of truth -- even beyond what scripture says or was said 'in tradition' -- is often needed. It has happened before and will happen again.