A low stance is good for training. But if you cannot move your kua in that low stance and end up just shifting your weight front and back, side to side (or worse, not moving at all), then you will not learn how to relax your kua and use it to absorb your opponent's force. Your low stance would be a rigid stance that is good to train up your leg muscles, but nothing to improve your taiji.
A low stance makes it easier to train you to move your kua, the important thing is to learn how to move your kua. Not the low stance. One is the aim, the other is the method. Don't put the cart before the horse.
A low stance makes it easier to train you to move your kua, the important thing is to learn how to move your kua. Not the low stance. One is the aim, the other is the method. Don't put the cart before the horse.