it is a good point regarding the additional room in the shoe and having to re-tie the shoe laces. However, this is much easier issue to deal with than having to go to the bathroom, let's say, take your shoes off, take one of the inserts out and put it into your pocket
Actually, I saw somewhere one company planning to make the shoes that tie themselves
Again it all starts getting very futuristic.
However, having said all that, what surprises me is that in so many years nobody has come up with more advanced solution than a wedge in a shoe.