"consumer privacy" in this case would be your safety while on said bicycle, imo, and square wheels will send you for a tumble.
AI slop comes with security holes (see recent Tea business, and countless other examples). As a user of Proton services, paying actually quite a bit of money annually for that — and being that they talk a really big game about how secure and private they are — I expect their app to be MORE secure than your average mail client, not the same, and not very possibly LESS secure.