I can see the similarity yes! Although I do feel like the distance between handwritten letter and an email is shorter than between email and LLM generated email. There's some line it crossed. Maybe it's that email provided some benefit to the reader too. Yes, there's less character, but you receive it faster, you can easily save it, copy it, attach a link or a picture. You may even get lucky and receive an .exe file as a bonus! LLM does not provide any benefit for the reader though, it just wastes their resources on yapping that no human cared to write.