All remote based typing is awful, T9 included. I can’t speak for everyone, but I can type with swipe gestures on a virtual keyboard via remote faster than I can input T9 text. I’m unaware of any stock remote for a device with a full keyboard. I would argue Apple has text entry perfected at least as well as any other major manufacturer. You have virtual keyboard entry, solid voice-to-text, and it can be configured to push a notification to your iOS device when you enter a search bar which will auto-open to the remote app and pull up the keyboard. Because of this feature passwords can also be autofilled from Keychain to make logins easier.

You may personally prefer T9, but I’ve never seen anyone in the last decade input anything into a TV via T9. And you’re asking why it doesn’t have voice input, when it does. You admit to having never used an Apple TV yourself. I hate the idea of app-only interfaces features, but this isn’t a case like that. Maybe you should understand the features of a product before you call it “fucking stupid”.