Why am I getting access to internal storage even when I set my app for external storage?

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Android

image

storage

I am confused, both parameters, "EXTERNAL_CONTENT_URI" and "INTERNAL_CONTENT_URI", access and display images from "Photos" and "Camera". Shouldn't only the second parameter access them? Furthermore, I did not ask for any permission to read image files from these places and yet I can read and display them in my application. Shouldn't the OS prevent it happening?

Here is the piece of code I am using:

Intent intent = new Intent(Intent.ACTION_PICK,
                android.provider.MediaStore.Images.Media.EXTERNAL_CONTENT_URI);
                //android.provider.MediaStore.Images.Media.INTERNAL_CONTENT_URI);
        intent.setType("image/*");
        startActivityForResult(intent, 0);

What I have tried:

I tried both parameters and I was able to access the same image folders.