Because it’s incredibly hard to connect to Starlink. People are building their own mini towers to mount dishes above their houses and trees because even a big dust cloud or a strong breeze can mess with the line of sight and position of the dish and break the connection.Why couldn’t it connect to star link? Using your logic, nothing is worth creating. So should nobody create anything new? It may be pointless to you, but the world doesn’t revolve around you.
Now imagine that but in a tiny phone obscured by your house. Or even outside but moving. It’s not going to happen.
My “logic” is one of the foundational steps in creating a product. Without a reason to exist, it’s not likely to succeed. You might not understand that but Tesla certainly does.