This revision has been submitted to the devs to push the change, so unless there are any critical issues, this is the final version and I will not be modifying it anymore.
(I have cut down the post body to make the request clearer for reviewers; you can view the revision history for the original question.)
The current modal that appears for someone asking for the first time doesn't really contain helpful information for our site; however, we can change it.
After deliberating with the community, I formally feature-request the following.
Change the text before the note about searching the site for duplicates to:
Welcome to Code Golf & Coding Challenges! We host recreational coding challenges & related questions including code golf, fastest code and code golfing tips. All challenges must have an objective scoring criterion, and should avoid these listed points.
Questions about help with general programming-related issues are off-topic here and will be closed.
Please post your challenge as a draft to our Sandbox for Proposed Challenges for a few days first for feedback. Doing so allows you to correct issues you might otherwise miss before posting to the main site.
Change the text after the aforementioned note to:
The following bullet points only apply to non-challenge questions
Remove the third bullet point.