Danger is the one factor promoted in curbing the trajectory of this regulation. Totally valid.
Now, don't we also have the right to health ? I am not going to cover all the types of stresses inherent to this profession. What I believe is this area needs to be tackled as well, especially as our retirement ages (depending on countries) are called to be stretched even further. I strongly believe in that right which ranks second, immediately below the danger factor.