Here's my theory.
Coding is unusual in that non-(ex-)technical managers don't have the foggiest clue about what's involved, as 90% or more of software is invisible. As a counterexample, even a layperson knows you don't build a house by starting with putting the roof on. But the equivalent intuitions are not present for software.
Even many business functions, while specialised and difficult, a manager might think they at least know what's going on in logo design, or bookkeeping, or cold calling customers, or assembling a contract from boilerplate. But creating software is totally foreign to them.
I think that makes managers feel out of control, as it makes their technical staff relatively powerful compared to most staff.
That's how these low code "citizen developer" things arise. They sell, not to engineers who would be after a better tool, but to managers, who want to feel in control. And, coincidentally, who are the ones with the budget to spend, and the time to drip-feed the idea into more senior managers' heads for approval.