Here's why:
* Meaning: "Free" usually means "not subject to constraint or limitation." It's a binary concept - something is either free or it's not. You can't be "more free" than someone else, you're either free or you're not.
* Context: If you're trying to express degrees of freedom in a specific context, you might use other words that convey the comparison:
* More liberated: "She feels more liberated since she quit her job."
* Greater autonomy: "The new policy grants employees greater autonomy."
* Less restricted: "We are less restricted in our travel now."
In short: While "free" itself doesn't have comparative and superlative forms, you can use other words and phrases to express varying degrees of freedom depending on the context.