Anyone with both product and outerwear experience?

My neighbour has a luxury lingerie brand.
As well as dressing A list celebs, she sells all the prototypes that didn’t make it into her range to Victorias Secret.
She doesn’t sketch anything. Goes straight to prototype, doesn’t understand the point of sketching, to her there’s no point, it’s an extra step, until she’s made a sample, she has no idea if it is going to work out. And lingerie is all about good fitting.