The Fager philosophy! To take away thick and heavy bits and replace with a lighter ergonomically designed option that takes up much less space in the mouth.
Thinner bits are not necessarily sharper and more severe due to the pressure they exert on a smaller surface. Fager takes the opposite approach with thinner bars and joints to give more freedom inside the mouth without locking the tongue. The thicker bit will also sit "higher" in the mouth meaning the upper bar will press on the bit ad subsequently the lower bar giving much more unnecessary pressure than a thinner bit - even before a contact is taken up!