How does autoload work in laravel?

Question

Composer

"autoload": {
        "psr-4": {
            "App\\": "app/",
            "Database\\Factories\\": "database/factories/",
            "Database\\Seeders\\": "database/seeders/"
        }
    },

I study composer.
What confuses me is that the databse path is duplicated in laravel composer.json. That is, developers could simply write like this:

"autoload": {
        "psr-4": {
            "App\\": "app/",
            "Database\\": "database/",
        }
    },

And in the end, all seeders and factories will be found in the database folder. Why is there duplication?

Answer 1

there may be folders that do not need to be autoloaded