Do we not remember how Google immediately enabled TLS everywhere, internally, post-Snowden [0]? Remember when Google was "outraged"? Where are those people now? They surely don't work at Google anymore. It's amazing how enshittified Google and Apple have become in a decade.
Not at all a problem that is viewed as so impossible that the very notion of it is beyond belief to the overwhelming majority of software developers. Google can just waltz on down to the corner store and get a jug of unhackable phone software. They just do not want to.
The fact of the matter is that they are incapable of making systems consistently secure against even moderately funded professional cyber demolitions teams. This is true across the entire commercial IT industry with literal decades of evidence and proof time and time again.
Could it also be a conspiracy? Could they also have deliberate backdoors? Sure. But even without them their systems and everyone else are grossly inadequate for the current threat landscape which only continues to pull further and further ahead of their lackluster system security.