Why can't we have folders with the same name in App\Controllers and \Public?

Hi,
I noticed some errors in my app, and after some struggles, I decided to rename a folder that had the same name in Controllers and Public. After that, my app worked. So, is there something I'm missing here. Because for me, the below would not work:

Code:

- app
  -- Controllers
      -- Backend
- public
      -- backend

Thanks.

If you have a folder, your web server searches it and does not route to PHP (CodeIgniter).

ci-phpunit-test | CodeIgniter Testing Guide | CodeIgniter 3 to 4 Upgrade Helper

If you have a folder, your web server searches it and does not route to PHP (CodeIgniter).

Thank you for the info. It would be nice to have a note about this in the documentation.

I added a Note:
https://codeigniter4.github.io/CodeIgnit...irectories

ci-phpunit-test | CodeIgniter Testing Guide | CodeIgniter 3 to 4 Upgrade Helper

Thank you.