Erm, WhatsApp would suggest otherwise.

WhatsApp was the vector for zero click access to a target's phone from Israel's weapons grade hacking Pegasus toolkit. They would send a video call, typically in the middle of the night, and with no input from the used they'd get full access. My personal belief is that they used functionality WhatsApp itself uses to access user data.

There was also an encrypted phone called ANOM, which had this trick calculator app with a hidden encrypted messager. "Made for criminals, by criminals". Except, when the guy started his business he got investment from the FBI and Australian Federal Police to pay for the servers and some of the phones themselves. Basically every time it sent an encrypted message it sent a separate encrypted message to the ANOM servers. It's entirely possible (perhaps even likely) that WhatsApp would do this also.

As for Google, they're truly insidious. Lots of banks now require you to connect to Google captcha servers - they don't give you the pictures, it's just the back end, basically the tracking parts. Then there's the controversy about them collecting location data when users have said no. They absolutely do collect data they shouldn't.