Make child/parent asset position default to END of article, not in a new column

It's so frustrating how a parent or child asset becomes an automatic sidebar in our layout. So you can lay out an article beautifully. But if, a year later, you add that original article as a child asset to a new article, then it ruins the layout on the original article -- putting this "sidebar space" on the left column with one article in it, and shifting the layout of the whole article to the right. So then every time I add an old article as a child asset to a new article, I have to go back to the old article and fix the layout, so that its new "parent" is inserted at the end, rather than default being moved to the left side and ruining the layout.