The article doesn't get the concern of the curlers right.

Curling has recently undergone a similar transformation that other sports have gone through over recent decades: the sport has become a lot more athletic. Of course, the sweepers and the thrower play important roles in the outcome of the shot. But with newer sweeping technology, the need for the curlers to be as athletic has diminished, making the training that people like Brad Jacobs and such have done effectively meaningless.

Curling is much like golf; its a game thats supposed to be a mental battle as much as a physical one. And not just in terms of strategy, but also in terms of consistency and focus and effort.