My intuition is that indentation is more readily apparent. You can tell that a group of lines or an individual line is indented or not at a glance. It's natural to see that they are grouped. With braces, you have to search for the opening and closing brace, and furthermore you must search within those braces to ensure another brace set isn't being opened, in case you missed one. You have to learn both -- about how to designate a set of statements as grouped using opening and closing braces, and how to detect a common class of errors related to nesting braces.
The thing is, those of us who prefer braces or other syntax elements also indent. It's not either/or. I want the redundancy. I can more easily see how things line up.
> With braces, you have to search for the opening and closing brace
It's probably been 20-30 years since I used an editor that couldn't highlight the matching brace, and that wouldn't show me which opening brace the closing brace I just put down matches up with.
But it's just been a day since the last cut and paste "accident" left me with a badly mis-indented piece of code... which I happily could auto-format back to sanity with a couple of keystrokes because the indentation was not all the editor had to go by.
