Consider website builders. Have they made web developers redundant? Generally, website builders suck. They do not allow for the customisation and flexibility required. Static site generators, such as Jekyll, are pretty good for their limited scope, but tools such as Webs generally remain bad for any purpose.
I don't believe some kind of drag + drop editor will replace programming. Even if some kind of editor could, additionally, design underlying functionality and design well, programming also involves a certain style of thinking. Mathematical thinking, for example, is not only applicable in research mathematics. I don't think "business people" could design apps better than us, even if such a tool exists. Indeed, the converse has been true, however (software engineers have indeed managed to replace, to some extent, business people). Startups have thrived on the idea of not monetising early, I think that's something missing in traditional business.
I don't see software engineers being replaced by drag+drop editors, or the typical users of such editors, ever. Conversely, I believe software engineering is one of the most secure job fields there is (some others being mathematicians, scientists, journalists, etc.) - though I may have a bias in this respect.
What may be true, however, is software engineers being replaced, to some extent for some tasks, by their own creations. Although it may be an interesting discussion, it usually follows a lot of hypothesis and any evidence-based discussion on that matter tends to be moot.