Completely unfounded speculation on your part does not make other’s beliefs baffling.
OP is making a claim that privacy is top notch with no proof. I don't really agree that we can automatically say it isn't because it's closed source, but it's pretty hard to confirm that it is without reading the source code.
It's baffling at best that you imply you believe this.
It's proprietary software (so you can't prove it already at this point) from one of the most user-hostile companies in history, and one that at the bare minimum "was" involved in mass data gathering programs (example: PRISM), but everything points to "still is" and "will be" - not only for arbitrary governments but for its own pockets too.