controller laravel not sync with fillable code example

Example 1: what is actullay work model in laravel

/**
 * The attributes that aren't mass assignable.
 *
 * @var array
 */
protected $guarded = [];

Example 2: what is actullay work model in laravel

<?php

$flights = App\Models\Flight::all();

foreach ($flights as $flight) {
    echo $flight->name;
}