The purpose of braces are two-fold: let the compiler know what's going on and let the reader know what's going on. It takes no thought at all from the programmer and only needs to be done once. The intent can't be messed up by any of the zillion transmission methods, including, but not limited to, email, web forums, or differences in editors or editor settings. Pretty formatting is a key-stroke away on any code editor worthy of the name, and many will auto-indent code as it's pasted in.
On the flip-side, you have Python, where any of the above transmission methods, plus a whole lot more, can cause the original indentation to be lost. On top of that, the editor cannot infer semantics when code is pasted in, so the programmer needs to analyze the surrounding code and make sure the indentation of the pasted code is correct. In other words, there's no way to automate. Any time you have the developer doing work the computer could have done, you're doing it wrong. The entire purpose of a computer is to automate tasks. (And provide video game entertainment, of course.)