Most won't even care about that, they just install without reviewing.
I doubt it's much different in other platforms. Mac OS or Android or Linux. When there is an update, most people don't have the time to carefully go over what it's doing. Nor should they.
When the plumber comes to my house, as he did yesterday, all I care about is that the hot water is coming and the toilets flush. I don't crawl under the sink to see if he properly greased the pipes or whatever the hell it is plumbers do.
I have met people who work for Microsoft and Apple and they are neat and earnest and are by all appearances proper and trustworthy citizens. I've also met people who contribute to open source OSs. They look like the guy who stands on the on-ramp with a sign asking for change. A little bit dangerous with greasy hair and a a psychotic glimmer in the eyes.
I'm kidding of course, and just tweaking people who use Linux (like myself), but as Eclipse (played by Frank McRae) said to Sylvester Stallone upon his imprisonment in the classic American film Lock Up, "You gotta trust somebody. Let me hip you to the joint."