What if you could eliminate a lot of the pain points that React solves but without having to write much (if any) Javascript but still have an application that feels like it's rendered client side while getting server side rendered templates for free, and things like "but I can share my logic between the backend and frontend" goes away because the backend can do both?

This is just one type of problem that Phoenix's LiveView solves and LiveView is only a small aspect of what Phoenix has available. I'm very thankful work is being done in this area instead of just accepting that everyone wants to use React.