Typescript - allowEnumStringTypes: Why enums and untion-types instead of only untion-types?

[SimonSimCity]

Thanks a lot for providing the feature #6237! Just wondering ... is there another option of only having union-types instead of enums? After reading an article about union types vs enums (https://fettblog.eu/tidy-typescript-avoid-enums/) I have the impression, that enums are not really type-safe and its better to use union types instead.

The types generated by this plugin (when having allowEnumStringTypes enabled) look like:

export enum Permission {
  Admin = 'admin',
  User = 'user'
}

export type Role = {
  __typename?: 'Role';
  permission: Permission | `${Permission}`;
  permissions: Array<Permission | `${Permission}`>;
};

But what would be the difference to this?

export enum Permission {
  Admin = 'admin',
  User = 'user'
}

export type Role = {
  __typename?: 'Role';
  permission: `${Permission}`;
  permissions: Array<`${Permission}`>;
};