It is important for so many benefits of the survival in captivity. The parrots are not for everyone, they are not domesticated as other pets that is why we call them 'companions'. The parrot are prey animals and have wings to escape the danger. In captivity they freth of everything as they were hand raised by the human. Soon they get settle in the family after just a month or so they start to show fear.

"Parrots are exceptionally social birds. In the wild, parrotstypically travel in large flocks, flying miles each day insearch of a wide variety of food and may congregate into anightly roost of hundreds or even thousands of socialconspecifics (Gilardi & Munn 1998). Stamps et al (1990)postulated that the formation and maintenance of socialrelationships within a flock may be as critical for survival as
predator avoidance and foraging efficiency and Birchall(1990) reported that wild parrots may use 90% of their timeforaging for food and preening their partners.Schuppli and Fraser (2000) explained that ethical objectionsto keeping a companion animal arise if benefits to the ownerare achieved to the detriment of the animal. They contendedthat “keeping a particular species might lead to suffering ifthe animals are prevented from carrying out an importantelement of their natural behaviour...”. Birds are routinely
denied two of their most fundamental natural behaviours:flying and socialisation. It has been suggested that thedenial of these activities can cause both physical (Graham1998) and behavioural abnormalities in captive parrots (vanHoek & ten Cate 1998; Garner et al 2003b; Meehan et al2003a, 2004; Meehan et al 2003b). Parrots kept as pets areoften housed alone or in pairs in small cages incapable of
accommodating flight (van Hoek & ten Cate 1998). Evenwhen not confined to cages pet parrots are commonly physicallydisabled through one of several deflighting procedures
to restrict or prevent flight (Hesterman et al 2001).There are several methods of deflighting including
‘pinioning’, the surgical removal of the distal wing portion,and ‘tenonectomy’, the surgical cutting and cauterisation ofthe main wing tendon preventing extension of the wing(Hesterman et al 2001). The most common form ofdeflighting in captive birds kept as pets is ‘wing clipping’which is a relatively simple technique that typicallyinvolves the non-surgical unilateral cutting of the primary(flight) feathers. This deflighting procedure is temporaryand birds regain their flying ability following the natural
moult and re-growth of feathers within a year to 18 months.Hesterman et al (2001) examined the welfare implicationsof various deflighting procedures on captive birds andpointed out that, although deflighting limits or denies thebird the ability to express the normal behaviour of flight, it
can allow them to express other behaviours (climbing,exploring, socialisation with human caretakers) that wouldotherwise be suppressed if confined to a cage.However, deflighting does not guarantee better welfare.Flight provides cardiovascular exercise beneficial to healthand allows birds to escape swiftly from predators includinghousehold cats and dogs, and prevents birds from incurringinjury when falling from high perches; wing clipping mayalso initiate feather-plucking behaviour in some parrots(Forbes & Glendell 1999; Hesterman et al 2001). Somebehaviourists and veterinarians are now recommending
against wing clipping for the physical and psychologicalwell-being of the bird and encourage the use of basicobedience training to assist in the control of flighted birds
(Forbes & Glendell 1999; McCluggage & Higdon 1999)".

Reference:

Animal Welfare 2006, M Engebretson, The welfare and suitability of parrots as companion animals: a review,