Every single site has a different way of giving you a way to change your password. This makes it impossible to write programs to write programs to change your password....like a password manager for instance. Imagine if you could just type in your new password into your password manager program, and it changes all the passwords it manages with one click. They could all be randomly generated and different for every site. Hints, recovery, email addresses, could all be updated with one click. With a history as to the previous versions in case something went south.
Instead of struggling with writing all the captcha's, and strength meters, and interfaces, and all the CRAP that the every site on the planet does differently. Just standardize the interface and maintenance of passwords. And then standardize the strength of the generator programs. And voila, permanent security that is controlled where it should be: in your hands.