Issue trying to programmatically post messages to a private Facebook group using Graph API

Question

I am trying to programmatically post messages to a private Facebook group. I plan to write the code to do this in Python. I would like to run the code from my laptop. I have seen multiple articles demonstrating how to write this code. I don't need help with that.

I am an Admin user in the private FB group.

The issue I have is the techniques described all depend on creating an app. This seems like overkill to me. I don't need a general-purpose app. I'd prefer not to go through the burden of getting an app approved.

Thus far, the only way I have seen to enable the required permissions to write messages to a group is by creating an app and adding that app to a group.

Is there a simpler way, that does not require writing an app, that then must be approved, when I don't need an approved general purpose app?

Thus far, I have not been able to post this question to the Facebook community. The webpage is throwing a cryptic error when I try to post.