If you're in tune with animals and spend time around a parrot, it's obvious there is a lot going on in their minds. They have incredible memories and their own understanding of their world. It looks simple to us but they are not simple creatures. That being said, I don't know how a bird lover can keep a bird in a cage.
Many animals (including birds, dogs, horses) like the sanctuary and comfort of a cage and choose to use them, but obviously it shouldn't be used like a prison.
I feel similarly about cats. I absolutely love cats but I didn’t have one for five years because I refuse to own one in an apartment. It seems like people torture animals to make sure that they have some attention when they get home
If you're referring to keeping parrots in cages outside of their natural habitats, that ship sailed when they were brought to non native locations. I'm being hyperbolic, but I assume you don't want them to be released in the wild and die, right?
We have some feral colonies set up in places like Miami and San Francisco, but not all species thrive in warm locations.
That said, my palm sized green cheek conure is rarely in his extremely large cage (it's 4 by 4 feet). Door is always open unless he's sleeping or we're out of the house. Usually he's with me on my shoulder when I'm working during the day and gives his "2 cents" when I'm in meetings.
Most parrots kept as pets prefer it locked for security reasons. He'll get anxious if it's not when he's trying to sleep.
I've seen a lot of terrible bird owners, but I also know plenty that enrich their bird's lives. My little conure has a surprisingly extensive vocabulary for a species not known for speaking.
He says "poo" when when he has to poop, "what's up?" when he greets anyone, "whatcha doing", "<his name>", "yeah!" (mimicking Little Jon), "stop" (when he doesn't like what we're doing), "good boy", "Love you" and a few others I can't recall off the top of my head.
We have a 3-year-old African Grey - he has 3 cages dotted around the house, but he only sleeps in one which is in our bedroom at night, and we never lock him in even if we leave the house.
He knows when we are leaving him when we say goodbye - the garage door opening - the car - the gate opening and closing.
During the day he sits in the home office with me and my office days he is around my daughter.
Most of the time he sits on the top or the side of the cage perching on wooden sticks.
Occasionally he will dismount if the gardening services are busy making a racket with the weed whacker and will walk to the bathroom and climb to the top of the shower.
The one cage is close to an outside gate so he will climb on the window or the gate itself during summer.
We also have 3 cats, but he just walks past them, and he talks and even scolds them in my voice.
> I don't know how a bird lover can keep a bird in a cage
I'm convinced that people that keep (uninjured) birds in cages are narcissistic sociopaths. This is based on the conversations that I've had with them about it. Life's too short to deal with people like that. I'm thankful for the indicator to avoid them, but I'm sad that it's at the expense of a bird.
That's kind of how I feel about most pets.
I've thought about getting a pet turtle or tortoise [1] because they are my favorite animal, but I found out that in order for them to be happy and healthy they need a lot more room than I could easily fit in my house. Either a very large aquarium or a very large area for them to walk around depending on the species, neither of which I can easily have in my house.
And I think a lot of animals are like that. Ultimately a lot of these animals evolved in areas that really aren't that "confined" in any meaningful sense, and forcing confines seems kind of cruel.
[1] To be clear, ethically, not one of those shady endangered black market things that you can find.