Crossing my fingers that I find myself (in 9 short years from now ) complaining about this rule.
If I can pass a PC & a medical, tell me why the Hell I should ground myself just to keep some whining "long term" FO (normally to be found on pprune whenever this is discussed ) happy.
In 30 odd years he will be whining again, the only difference being that he will be saying the same as me rather than the opposite.
It is a great gift in life to posses the ability to juxtaposition yourself into other peoples situations before jumping in with both feet, a shame so few of us ( & for the avoidance of doubt I include myself in this
) have the ability to do so.