They demand it, when they do not receive their cuddles and skritching. Cockatoos are very physically active. They romp, stomp, swing and flap to a great degree in play. Cockatoos get carried away or overexcited in rough play and I play very gently with my Male Moluccan. Their playstyle is gentler than South American birds, being less beaky and less physical.
Cockatoos are more curious and adventurous than some other parrots.
Cockatoos will leave their playstand and take a tour of your entire house seeking adventure. When you set another species of parrot on the floor, that species may feel vulnerable and become intimidated, not a Cockatoo. Cockatoos are delighted to be down there on the floor. It is an opportunity to begin exploration activities. Cockatoos bore easily and keeping them challenged requires a lot of your time, both planning time and interactive time.