I think most confusions come from how divisive significant white space can be and Python being the most popular among that class of surface syntaxes. I am aware (and maybe you are, too) that there is a long list besides Nim: https://en.wikipedia.org/wiki/Off-side_rule, but this does not seem to be very common knowledge.

I think this is a big part of the aesthetic similarity. Without curly, or ordinary, brackets delimiting code blocks you get that nice clean look. Having used Python a lot for a period (and having made one toy app in Nim) I now find especially curly brackets visually noisy.