Do you not see how ridiculous that is?
Immutable decisions, race, gender, these things you are born with (barring gender reassignment surgery in the most advanced civilizations) being able to be changed vs. being able to pick a different faction, even though you already were once a recruit, and they are in dire need of soldiers. Sure people can wave the "BUT S-E told us, so it's okay!" flag, but it doesn't mean it makes a lick of sense when you view the situation from a logical point of view.