I'm going to suggest something blindingly obvious that you definitely already know, and then follow up with lots of guessing.
Thanks for that - yes, it was blindingly obvious but perhaps equally obvious is that if I'm asking the question it is because that scenario doesn't always apply.
As for the liquid cooled cables - No, hardly any of them are set up in that way, and the ones that are - aren't going to run that fast anyway because my car is older and limited to 120kw charging. Well within their capability for the dual 2-gauge wires (which is what Tesla uses for the 250kw chargers that aren't liquid cooled!) without any special magic.