Agreed. But you couldn't do much on a PC when they launched, at least compared to a mainframe. The hardware was slow, the memory was limited, there was no networking at all, etc. If you wanted to do any actual serious computing, you couldn't do that on a PC. And yet they ate the world.
I can easily see the advantage, even now, of running the LLM locally. As others have said in this topic. I think it'll happen.
edit: thanks for clarifying :)