Something tells me most hobbyists are not doing their car battery welding on-the-fly in -60F weather in the middle of Sibera with the stakes of failure being freezing to death though.
I inferred that he was simply saying the fact of using chained car batteries for welding is hardcore, which I obviously think is not as I've seen it done by many people in many places.
As for the situation in this context though - sure, that could be said to be hardcore.
As for the situation in this context though - sure, that could be said to be hardcore.