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I can't speak for everyone, but for me there's a big difference from wanting to know everything about the computer and needing to, particularly when I'm not at work.
These days setting up a Windows or Apple system means fighting lots of relatively confusing dialogs and options to avoid using cloud services, etc. Modern consumer operating systems want to analyze every bit of your activity they can get their grubby mitts on and you really have to fight them and say "No thanks!" about 15 times on a modern phone and less, but still a lot, on Win/Apple. I care about privacy, like most…
Windows is a little more frustrating, and I don't think Microsoft has the same level of privacy commitment as Apple does, but I also don't think it's that far behind.
Google is a special case, they are an advertising company and have virtually no revenue streams outside of that for Android. I'm sure they'd like to protect your privacy too if they could still serve super targeted ads to you, but they have no way of doing that.