This is terrible reasoning.
A good tailor would modify the type/amount of padding or wadding for the cloth and degree of shoulder extension. Evidently, NSM does not. That in and of itself is a big error. It's as if they are rotely following the instructions for a wadded, extended shoulder (where the wadding is used to keep the shoulder line from completely collapsing), but not adjusting the proportions or position of the wadding for less shoulder extension.
You can choose your line or your padding but not both.
You prefer lines. Mina prefers the absence of padding. Those two statements are fairly unrelated to each other.