I couldn't agree more. For many people the main point of a smartwatch is that you don't need your phone with you all the time. Cellular connectivity should be considered a given. When going for a walk, I'd just leave my phone at home. Telegram is probably the only app I use now that would undermine this premise. I'm so excited to buy an Watch very soon, but now I learn that Telegram wouldn't work on it as expected. Damn!
There's hope. I find out Telegram has announced a coding contest with a task of creating a standalone Watch app and deadline on 23:59 March, 21 (Dubai time). After the initial announcement message (what I linked here), there was a second one with more details of how it should be done, followed by mockups in PNG and Sketch files.