[still_grokking]

> If I copy a block of code from indentation level X and paste it to indentation level Y when I have explicit end-of-block tokens the worst thing that could happen is that I end up with badly indented code that I have to clean up manually.

That's exactly the same "clean up" you need to do if you did something wrong while copy & pasting code without the useless block delimiters.

The rest is made up as someone pointed out already: Exactly this story comes up every time but in reality it never happens. (Besides when someone tries hard to get it wrong by all means only to prove their made up point).