Why do Met Police and Strathclyde Police officers have to practice drill whilst training?

I mean it seems pointless as when they leave Hendon or Tulliallen they will never march again. Are they strict on it, like they way you move your arm when marching or not keeping your eyes facing front when at attention? I have seen videos of passing out parades and they all look like they hate it. I know I would. ... show more I mean it seems pointless as when they leave Hendon or Tulliallen they will never march again. Are they strict on it, like they way you move your arm when marching or not keeping your eyes facing front when at attention? I have seen videos of passing out parades and they all look like they hate it. I know I would. Thanks
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