So, don't keep your chickens in a solitary indoor prison. Give them stuff to do. Take them with you when you go places. Even when my turkey hen lost the use of both legs, I still hauled her outside multiple times a day so that she could poop and touch grass. My turkey is living outside again, but still sneaks inside the house if I leave the door ajar. Same with several chickens who previously had the privilege of living indoors.
At the end of the day chances will be
higher that an animal will choose the companionship to what actually
speaks the same language as them. Does that mean always? No, I don't believe so. Many animals have pretty unique personalities and preferences. In the case of a house chicken, it's forcing them, not giving them the
choice. Your examples show that your turkey and chickens still have a CHOICE? Chickens that are kept indoors fulltime, part time, and temporarily are all very distinct and separate categories in my eyes. Each has their own set of factors to consider.
I think you've pretty clearly got the point that an indoor chicken isn't an ornament and that it's work and they needs enrichment etc. That's great! The thing with these threads is they're often trolls with no intentions of that and will post links of cages and enclosures that are just a prison. The people who come against those posts SO strongly are simply people trying to prevent that ever becoming a reality for an animal. Even if the OPs are only doing it for trolling, these thread are still here for some inexperience person or child to come across and be completely mislead.
I think some people also aren't prepared that this is a MULTI YEAR commitment. People can go into it with all the time in the world to socialize and care for their indoor chicken perfectly, but then life happens and you have to work, or study, or move, you realize you can't go out or travel.
The whole thing is far from chicken + house = indoor pet.
Please note, this post is largely me just sharing my thoughts that came up when I read your post. I have a hard time composing my posts on my own so will tag on things I want to say to what others have already contributed. Basically this isn't ALL directed to you or anything, I'm just sharing my thoughts.