You think a nearly trillion dollar public company has an internal division that writes malware against flaws in its own software in order to harvest data from its own apps. It does this to gain just a bit more data about people it already has a lot of data on, because why not purposely leave active zero days in your own software, right?

You think you are being the smart one here?

No, that's not what I said. Also cypherpunks and other hobbyists are not that much smarter than corporations and nation-states, to be the only ones to think about plausible deniability.

For example, the whole Windows sources have been given officially for various 3-letter agencies of various countries (Russia included) to study, and of course there are vulnerabilities with the size of such codebase. MS might not have left obvious backdoors and informed FSB of them, but it has given interested parties the ability to find those themselves, which is only a question of work, or maybe make tampered versions of DLLs and what not easier.

Also they are legally obligated to silently comply with a lot of things.

That is wildly conspiratorial thinking, and honestly plain FUD.

WhatsApp and Facebook (before it bought WhatsApp) have both done this, Telegram has done this, MS has done this, even Apple has done this.

when you make up wild cabals that are running double secret malware attacks against themselves inside Google.

You made that up, not me. Should have tried to read what you are being told first.