Lightning Networks problem is that its a "heavy" protocol. You need to sync base layer you need to sync LN graph you need to manage liquidity. And any mistakes, bugs, etc. your own funds are at stake and there are no insurance/customer service/refunds. Its alot of work and risk. And how many users are there? Its like setting up shop in the desert! But maybe eventually this guy who decided to set up shop in the desert will find himself surrounded by casinos and what not one day. A big city.