If MS has built an OS that cannot be effectively maintained without being sneaky and deceptive about their data gathering, that's their problem. Don't ask me to sympathize with them just because doing things right is hard.
Go in to the Settings app > Privacy > Diagnostics & Feedback and scroll down to the "View Diagnostic Data" section.
Its not really all that sneaky or deceptive or dishonest or any of that. Its just being portrayed as such by anyone writing about it in the press for some reason.
Give me the keys to read the raw stream and we can talk.
It's like saying that you expect letter carriers to read every letter they deliver because there's no way to prove otherwise. They can get caught doing it, and if they are they're severely punished. That's your insurance.
Nothing is perfect, but somehow it still works. You can't always get 100% assurances; that's the nirvana fallacy. If you insist on it you'll just dismantle a system that was otherwise working perfectly fine.
Are mail carriers foolproof? No, but they serve a purpose.
Are privacy policies foolproof? No, but they serve a purpose.
Collecting too much data: Ooops we're sorry. Facebook has breached on multiple occasions their deal with the FTC. Until now not much has come out of it.
European data commissioners have requested more detailed information on telemetry to be able to certify Windows 10 for use in public offices and have been stonewalled so far. Not exactly trust-building.