The corset is for structure rather then cinching. Corsets don't hurt to wear or are to tight, unless to cinch them in like crazy. They are made to fit you body rather then the torchur of Victorian body shaping. lol
The problem with her design is there is Zero top support, so there is the need to build the support from the midsection instead.
Nehelenia is the same as the dress would not stay up on it's own with all the fabric without straps.