You don't need to be permitted to install an app on your laptop or phone (despite big tech's wishes), neither should you need it to install a new kitchen in you

You don't need to be permitted to install an app on your laptop or phone (despite big tech's wishes), neither should you need it to install a new kitchen in your house. In a reasonable world, if the contractor is licensed (as you state), that should be all you need for insurance and selling the house. If the work isn't safe, you go after the contractor, maybe with a lawyer. Government shouldn't intervene in each individual job.