Commonly those statements are generalizations and rarely take into consideration an Ekkie on a mission /task and a will to make it happen.
Like the majority of mid to large Parrots that have never or rarely had toys to play with, or better stated make tiny pieces of are common sources of this type of statement. The Parrot had never been allow to activity use its Bill to its fullest. If you add to this a diet that is not challenging (fully prepared) the Parrot likely has not developed a comfort in activity using its Beak.
Stepping way out on a limb here, I 'believe' that an Ekkies diet tend not to have a large number of 'hard' shells to open. Working with fuzzy memory on this one, so corrections welcomed!
Enjoy your Boy's will power and joy in making big things tiny!