I think we need to talk about the definition of "low voltage". In my understanding it's everything below 1000V. Solar power systems often provide a voltage up to 1000V, by serially chaining modules. Running them in parallel with ~50V would require quite massive cables.
Edit: About the danger of DC wires: There are technical solutions to mitigate risks. They may be too expensive though. I think we can reuse some of the strategies electric cars use. It's the only end-user application I know that uses DC powered cables with up to 900V (Lucid Air).
Edit: About the danger of DC wires: There are technical solutions to mitigate risks. They may be too expensive though. I think we can reuse some of the strategies electric cars use. It's the only end-user application I know that uses DC powered cables with up to 900V (Lucid Air).