I think you're right and I'd go even further and say most people don't want updates because they know that basically anything could change. I imagine non-IT folk look at computers like appliances, and so I can sympathize because If I woke up every 6 months to find all my appliances interfaces had rearranged themselves, I'd never update anything.

I work in IT and I absolutely loathe Android updates, every time I update my phone the update will break something, or at least the interface for something I use frequently will change again, I absolutely hate it. I still install them because it's impossible to get just the security patches without the rest, but if I could I would go back to the OS my phone shipped with in a heartbeat.