Should we allow children to choice the vegetable they eat?

It seems that allowing children to choose the vegetables they eat, increases (up to 80%!), the consumption of total vegetables. This has been highlighted by the University of Granada, http://www.fondation-louisbonduelle.org/france/fr/professionnels-de-sante/resumes-d-articles-scientifiques/permettre-aux-enfants-de-choisir-les-legumes-quils-veulent-manger-augmente-leur-consommation.html

It has also been shown that the bitter taste of vegetables such as spinach, cabbage, broccoli , ... was a factor that decreases children’s consumption.