Why do you hate autoindent? Have you seen issues with autoindent while developing? Vim `set autoindent` works well when configured with how you do tabs for a given language (ie `set sw=2 sts=2` for JavaScript)
Habit! My original point, once you're habituated, it's much more natural to type an indent than to delete an automatically generated one because you want to go back one indent level, say for a closing curly brace. This just interferes with the "flow".