I'll bite:

Copy can signal that a real person spent time on the details and cared about the product. Auto-correct and speech-to-text still carry that idea.

Even boring corporate PR language communicates something. It says the company wants to project stability and predictability, which can be reassuring. Slightly awkward, unpolished copy also sends a signal. It suggests a person speaking directly off-the-cuff rather than polished corporate messaging, which some people prefer.

LLM-generated copy sends a signal too, and not always a good one. To me, it often suggests the author didn’t care enough to think carefully about the message - not even enough to edit something that came out of an LLM.

At that point it starts to feel like someone just prompted Claude to build a reminders app with no care or thought put into it, which I could do myself if I find this idea valuable at all and even personalize the hell out of it. Maybe that's an unfair first impression! But it's not a crazy one given how quickly the cost of code is approaching 0.