>>23476984
It's from one of the multiple interviews Inoue did during Donbros, not gonna waste more time looking more shit up for a retard like you. But here's an interview where Inoue describes how he even has to write the bike scenes into the script, and how the producer is there to prevent the director from doing as he pleases and changing the direction of the story:
https://desuarchive.org/m/thread/20914959/#20917990

And if you've read any novel, you know the writers are fully capable of doing detailed fight descriptions.