Why would I need emacs for "complex behaviours" if I have <insert any programming language> installed on my computer? For example, I made a lot of scripts in P

Why would I need emacs for "complex behaviours" if I have <insert any programming language> installed on my computer? For example, I made a lot of scripts in Python to refactor codebases by automatically splitting files (including imports). Could I do that with emacs? Probably yes. But why? For most intents and purposes it doesn't matter if your "automated editing" environment is integrated in your editor.