为什么有这种从远到近的说法，理由何在？我也不明白

这个人也不明白：

BLEED ORDER

It's common knowledge to start at the bleeder farthest from the master cylinder and work your way closer to it. In 20+ years working as a professional auto mechanic I've bled the brakes on more than 1000 cars. I've used the far to near method, the near to far method and no order what-so-ever, the results were exactly the same so I have to conclude that this ìcommon knowledgeî is nothing but an urban legend. Think about this: Suppose you have a 1/2 teaspoon of air in each caliper, what does it matter which wheel you do first? Is the air from one caliper going to travel to another caliper? That's ridiculous!