**Feature summary**
New topic tool should not allow adding sections without a header.
**Use case(s)**:
There's no new section where you would not want to have a header for it. Currently the only reason this is allowed is to allow advanced users to use a template/copy-pasted header.
**Benefits**:
As of when I checked [[ https://en.wikipedia.org/wiki/Special:RecentChanges?userExpLevel=unregistered%3Bnewcomer&hidebots=1&hidecategorization=1&hideWikibase=1&tagfilter=discussiontools-newtopic&limit=500&days=30&damaging__likelybad_color=c4&damaging__verylikelybad_color=c5&urlversion=2 | recent changes on enwiki ]], 448/500 new/unregistered users edits did not have a header in the edit summary. There's a few more edits that do still have header through a template like {{welcome}}, but to my estimation it is still the case that **~10% of new users are not using a header**. All of these edits require someone to either add a header or revert the edit, so it would be good to stop these edits.