Yeah that makes sense. That length looks nice for dressy occasions but I personally would hem any pants a little higher so you can see a bit of the shoe.I kinda tend to go for that look as well but that is because I have a long torso and need it in order to balance my body proportions out. I'm not quite sure what Lydia's proportions are but I feel like shes fairly proportionate in terms of torso length to leg length.
I think though the way she wears it is just her stubbornness of thinking how things should be which doesn't always work for every outfit. We see this time and time again… she gets stuck in a lewk that doesn’t work for her but puts it on repeat. Belts, hair, shoes, makeup, etc.