I agree with them. I have long ago discovered that if I know what a given scene looks like in exact detail I do not need to describe, because it comes over in the writing, in phrases and not as a set-piece. But I knew the assumption was different for adults. I used my usual method, but I added a hundred percent more describing. The would-be editor objected.
Adults are different.
They need me to do all that for them. Perhaps the difference is merely that they need me to do different things. I started writing for children at a point where all but a few children's books were very bad and inane. So inane were they that my husband used to fall asleep, when reading aloud at bedtime to our young, after a maximum of three sentences. The resulting outcry convinced me, not only that I could do better myself, but that it was imperative to put something in the books for the benefit of adults who had to read them aloud.