Custom setting for boolean checkbox is serialized as int value

When developing a custom extension and adding a new setting for a boolean checkbox in settings/myext.setting.php file as:

<?php
return [
  'myext_boolField' => [
    'name' => 'myext_boolField',
    'type' => 'Boolean',
    'html_type' => 'checkbox',
    'default' => 1,
    'is_domain' => 1,
    'is_contact' => 0,
    'title' => 'Boolean checkbox setting',
    'description' => '',
  ],
];

When this value is saved in Admin Form, the value is serialized as int i.e.: i:1;. This invalidates the code that treat this setting as a boolean value like:

// ** This won't work
if (Civi::settings()->get('myext_boolField') === TRUE) {
  // Do something...
}

. . . 

// ** This will work
if (Civi::settings()->get('myext_boolField') === 1) {
  // Do something...
}

We need to treat this value as integer in the code, which is not a programming problem, but I think it gets confusing about variable types.
In my investigation looks like the culprit is this casting to integer: https://github.com/civicrm/civicrm-core/blob/master/CRM/Admin/Form/SettingTrait.php#L343