Black metal and extreme metal in general are all about urgency... If theres a musician in a room with instruments and another musician (or not) then the music can and probably should happen, although not always as when extreme inebriation is involved haha. But it's all just about living in the moment FOR the moment, because you never know when you will have another chance to make the music that is in your head exactly as your are hearing or "feeling" it. It's  kinda a hippy approach, but I really do appreciate the sincerity of first takes, first mixes and the like.. Although most of the time they don't yield the best possible results, they can be useful as a tool for better understanding your motives as a song writer.