I have heard of this before, but as hinted at in the article, the kind of swaddling in question was super super tight swaddling, a practice mostly used in different cultures and different to what most of us would think swaddling is. I think it involves different materials to what a lot of wraps you would buy here now, materials that would give you more ability to get it really tight?

Years and years ago I spoke to midwife who had been in a developing country (can't remember where, perhaps Asia somewhere?) working on a project to discourage the super tight swaddling practice due to the hip problems, and she described it as different to the 'wrapping' that I do now.