> "It's visually obvious when code is correctly indented. "

Not when the beginning of the code block isn't on screen.

And more to the earlier point, configuring your editor to jump to the beginning from the end or the end from the beginning of a particular block of code going to be trickier than the equivalent in even vim for lisp, which is simply %

(And vim isn't even a particularly good editor for lisp, but out of the box unconfigured, it's better at lisp than it is at python.. % isn't even lisp specific functionality, lisp just happens to use balanced parenthesis which is something nearly every serious text editor happens to handle in a reasonably robust way, because balanced parens are generally useful in many languages, including python!)