This may be more of a question on what Ask Different community thinks of me than a technical question on iOS 9 updates.
Thanks to Alex Malcoci here, now I know how to stop the reminder about iOS update installation from popping up every day on my iPhone 6s with iOS 9.0.2. Also thanks to bmike on the same post, now I know that Apple doesn't provide users an option to turn off automatic download of iOS updates on devices with iOS upper than 9.x.x. I also learned from another post on Ask Different that I can, despite bmike's advice above, turn off automatic download of updates via mobile data.
So, the only problem left for me is the automatic download of iOS updates, which contain features and fixes that are most of times totally unnecessary and irrelevant for me, via Wi-Fi connection. As a sensible way to cut down my mobile data use, I leave my iPhone 6s connected to Wi-Fi at my house and disconnected from mobile data, whenever I'm home. I don't have problem with the storage space on my iPhone even if updates are downloaded automatically via Wi-Fi, since I still have about 20GB left empty on my device.
But still, I want to stop automatic download of iOS updates via Wi-Fi connection, and be able to choose which update to download and install. This is absolutely a matter of like or dislike, and not something that's causing difficulty or annoyance on use of my phone. So far.
Am I a social outcast who wishes to take control of what's downloaded to my device by resisting Apple's forced download policy, and who also deserves to stop living with Apple devices, if I dislike so much the automatic download? Which is more crazy, me disliking or Apple forcing?