Windows Guide

I agree with most of your points from a very high level, but this:

is honestly a dangerous thought process to me. Putting faith into huge organizations with outsized power in the world is a recipe for disaster.

Sure, getting malware is terrible and could potentially materially impact your real life if your bank account got drained as a result, for example. But by prioritizing security this much, one loses balance and view of the bigger picture, in my opinion.