Game development is not exclusive to business, but you are correct I have not worked for a firm to make a game. Nothing about that arrangement attracts me, especially given the abusive nature of the industry and the frequency that they go through crunch, lack any real worker protections, no unions, etc.
The way AAA studios make games and do business puts me off as well, so pointing to them as an example doesn't really change my outlook. I already don't buy their games and disapprove of their business models.
If I was interested in being exploited for my passion I would consider entering that industry, but as it stands I will be going solo dev.
No game dev company out there seems to treat its staff well during a game's development, so even if I wanted to work on a game as part of a team, I'd be looking at a poor work/life balance and a stressful work environment. I'm too old for that kind of BS.
If I can't build and release the game myself, then it simply isn't good enough to release. I cannot trust collaborators to not take control of my projects, nor would I entrust creative ideas to a for-profit entity without my cut.
Long story short, I might work in the industry if it was a healthy one. Because it's not, and I still want to make a game, it falls to me and only me to make it happen. That's kind of comforting, knowing your failure or success ride on your own action instead of someone else's. Nothing is more disappointing in a group project than failing because of someone else's fuck up.