Most programmers (including myself) are editing unstructured text and after that text is written the editor will tell them if it’s valid code or not.

Edit: I cannot reply, but there are structured program editors out there you may find interesting!

Yes, of course I do too, I live on the same planet, but that's an unstructured interface to changing the AST.

(You can reply to comments when the reply button is hidden by clicking the link to go directly to the post. I consider it a polite request by dang to consider whether a conversation is getting too heated, which I don't think it is here at all. Cheers, I'll try to check those editors out.)