Why can't we set `.prettierignore` to not be subject to `fast-glob` file scanning?

Thank you for developing the library. I always use it.

I think that .prettierignore allows prettier to set files not to be formatted, but I think that 'not formatting' ≠ 'it should be set up to be exempt from fast-glob'.
Intuitively, I thought that the behavior was that since it was not subject to prettier, it was not subject to fast-glob, but is that not the case?
https://github.com/prettier/prettier/blob/d4d4b185e0ddc3e0dd839b873e2ee7fe8131b684/src/cli/expand-patterns.js#L112

In case you're wondering, I understand that if I use !./data', it is not subject to fast-glob.

npx prettier --ignore-unknown --write . '!./data'

Prettier 3.0.3

Input:

npx prettier --ignore-unknown --write .

Output:

$ npx prettier --ignore-unknown --write . 
[error] Unable to expand directory: ".".
[error] EACCES: permission denied, scandir '/home/study/workspace/node-express/data/mysql/#innodb_redo'

※./data is a directory that is created by docker (root user) and causes permission error.

Expected behavior:

If .prettierignore is below, it is not eligible to be scanned by fast-glob and no error is generated.

## .prettierignore
data

Start at src/cli/expand-patterns.js around line 112 and reproduce the reported command with a root-owned data directory and a .prettierignore entry. Trace how ignore patterns are handled relative to fast-glob, then verify that the expected behavior is covered by a regression test or clearly documented if the behavior is intentional.