Why we don't use certifi root certificates by default?

Hey there,

Today my colleauge step into the problem with ceritificate that time to time appears with other people who use your client.
You can read about this problem more here:
https://stackoverflow.com/questions/59808346/python-3-slack-client-ssl-sslcertverificationerror

As I see the problem that people have some problem with root certificates on their machine.
Python always had a problem with root certificatates and to solve this problem people started to use the project certifi.

For example you can find usage of this project in the kinda popular library requests
https://github.com/psf/requests/blob/main/src/requests/utils.py#L63
https://github.com/psf/requests/blob/main/src/requests/adapters.py#L294

Do you have any reason to don't use library certifi as requests library uses?

I think it would simplify of using your library everywhere.

Stack Overflow のリンクで説明されている証明書検証の問題から始め、参照されている requests/utils.py と requests/adapters.py における certifi の使用方法を比較します。SDK の TLS セットアップを追跡して、デフォルトで certifi を使用する範囲を判断します。完了の条件は、文書化された判断と、証明書検証の動作に対応する実装またはテストがあることです。