Should there be code in the constructor of an @NgModule and if so what are some reasons for it?

It is possible to do this and code gets run when the module gets loaded:

import { NgModule } from '@angular /core';

@NgModule({...})
export class SomeNgModule {
  constructor(providedService: ProvidedService) {
        providerService.iCanDoThis('?');
  }
}

But if i wanted to initialize code, should i not use APP_INITIALIZER or some other hook?

I can't find a good reason for when this is a good use and how would it be helpful.

Probably another good question would be: When would this code be executed in Angular's application life-time?