Most phones are not keylogged.
You don't know that they aren't. The technology and incentive to ensure they are exists, so your assumptions are irresponsible.
Safety numbers
[They] store your keys whatever you want to call them, auth is how you get your storage.
You can sure install tools to improve your privacy from an app store
Yea, as part of a comprehensive understanding of what you're trying to achieve and how to achieve it, as inferred... That's the opposite of pretending products who's differentiation is privacy marketing are a good thing.