I think that Chopin's notation is giving a hint. The second note of the arpeggio is held as an eighth. I think that is a suggestion that as you play that second note you leave the second finger down and use it as a pivot while you bend your wrist to the right to reach the third note with the pinky. As you reach that note, you release the second finger and bring the wrist back in the opposite direction to bring your third finger over the fourth note, and then the thumb over the first note of the next arpeggio. So the whole thing is really just a question of swiveling the wrist right then left then right then left etc as you go through the arpeggios.