Why Symfony generates route with kernel name?

Question

I can't realize, why Symfony generates the route

kernel:
    resource: ../../src/Kernel.php
    type: annotation

I read documentation https://symfony.com/doc/current/routing.html#creating-routes-as-attributes-or-annotations

This command also creates the following configuration file:

# config/routes/annotations.yaml 
controllers:
    resource: ../../src/Controller/
    type: annotation

kernel:
    resource: ../../src/Kernel.php
    type: annotation

This configuration tells Symfony to look for routes defined as annotations in any PHP class stored in the src/Controller/ directory.

But why kernel: ? There are no annotations in the Kernel class, i can delete kernel: section and have no difference at all, so, what's the point ?