What happens if you move to, say, 2kV? Higher differences in potential create bigger risks of arcing, and need thicker insulation. Can this be mitigated in conn

What happens if you move to, say, 2kV? Higher differences in potential create bigger risks of arcing, and need thicker insulation. Can this be mitigated in connector design? Or is this just considered too risky to be anywhere near people? I realize this doesn't address the heat shedding of the converter or battery.