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by jochu 5252 days ago
Aside from reasons you mentioned, I can imagine it being because it easily allows one to add a sudo or being habit because of it. For example:

  echo 3 | sudo tee /proc/sys/vm/drop_caches
Will allow you to write as root and

  sudo echo 3 > /proc/sys/vm/drop_caches
Will be a permission error. It executes the echo as root and the write as the user