It also grows so if you don’t have the proper diet it can get all out whack and overgrown so you can’t eat properly and then your quality of life is wrecked and in extreme cases you starve
To complicate the matter it’s not like a tooth, it’s more like a dog or cats nail in that it has blood vessels running through it, so if the above happens you can’t just trim it back haphazardly because then you might be seriously hurt or even killed
Owning birds is fucked up. Like a domesticated dog is one thing and still somewhat debatable philosophically but taking a bird that can literally fly, often lives 40-80 years (if we’re talking parrots), is a social animal by nature that typically exists in a flock, demands attention and stimulation for many hours of the day, and then putting it in a cage so you can like look at it is just inherently cruel. If I come to your house and you have a bird I judge you