YIKES!! Thingamagigs, are you for real!? Yes, some of us humans are free, I'm feeling sorry for you that you don't feel that way. Our government sucks and I don't trust them, one bit. Besides that, birds are not born domesticated. They are not feeling domesticated even after twelve years in a home with you, sorry, sad but true.
Being free is way more better, than being imprisoned. Whether it be in our own lives or in a cage.
(( Ok... sorry for the long post in advance

lol ))
How are you "free" in the same way a wild animal is? You pay taxes, you pay for utilities, you likely have a job (or a partner with a job) or you have government assistance. You have rules imposed on you by government which tells you where you can live and build and how you live your life. It is essentially captivity human style
Freedom is an indulgence we can occasionally have when we go camping or swimming or frolicking in the countryside... then we have to come back to the reality of society and the rules imposed upon us

True freedom, for everyone, would be complete anarchy. But most of us are comfortable with the rules and confinement that keeps most of us safe most of the time.
I am not saying that its a horrible devastating thing, but it is reality
The same is true for our pets, a captive life means safety. I mean thats the basic reality of it if you don't want to complicate things or live in a dream world. There is no need to feel sorry for me, I am a realist and therefor content.

I don't delude myself into thinking that I have full unconstrained freedom.
Living a domestic life does not denote an acceptance of domestication. As you would have read, I mentioned that their instinct is for flight. Most species no matter how long they have lived a domestic life will still heavily rely on instinct. If you are to think carefully about it, no animal we share our lives with is truly "domesticated" but some animals fit our lifestyles better than others. Heck, there are a lot of people who aren't really "domesticated". I had to work hard on my acceptance of an ordinary domestic life LOL
Free flying is a different thing to being turned out into the wild. This has absolutely nothing to do with your choice of free flying your bird

(which I think is beautiful and I admire your courage, I am far more of a selfish coward

)
Such a thing is a personal choice and neither right nor wrong... so I wouldn't comment on such a thing. I personally have fully flighted birds who fly in my own home and will eventually have an outdoor flight room. But some others prefer to have their birds clipped for safety and to keep them indoors. Its just personal preference and I wouldn't berate anyone on their choice regardless of my own personal feelings.
When someone considers that setting captive born and raised animals "free" as in releasing into the wild (or to a sanctuary) would be in their best interests... thats a much different thing indeed. Its a thought based on a misconception

Which I do hope the OP understands more now... that being "free" (i.e. being wild) is not everything... but that being safe and with those you love can far outweigh the fleeting feeling of freedom... and that the safety of captivity in its own way brings a far more greater sense of freedom... that of being free of life or death concern.