The woman was corrected in the manner of her veneration: her attention was drawn toward Mary as the deliverer of the Word rather than a physiological creature. Her desire to venerate Mary was not corrected.
It is true that the precise manner of venerating Mary was not spelled out anywhere in the Gospel. The same applies to any other human liturgical practice: we still argue when to sit and when to stand, whether to baptise children and how to baptise, whether the Eucharist is to be unleavened bread, etc.
Basically, we find out own way to express our veneration: there is not right or wrong way, so long as it is done in true piety. Some contemplate icons, others pray the Rosary, light candles, kneel and prostrate etc. We are free to do as we please with that.
How does the word blessed get promoted to venerate?