It seems to me there are two arguments being conflated,soldiers whose service is no longer required due to issues with alchohol (I do not judge) and political correctness in the armed forces.
These seem, to me at least, seperate issues.Its always been the way that 'between wars' warriors services are less useful, as Kipling said;
"O it's Tommy this, an' Tommy that, an' " Tommy, go away " ;
But it's " Thank you, Mister Atkins," when the band begins to play"
When we don't need as many soldiers we get rid,very harsh and the decisions should be based on ?
As for the PC bit, its wheeled out to decry almost anything.I believe in political correctness,fairness,the human rights act & truth & justice !