without hearing everyone's account, also hard to determine the whole story.
from what I read from OP, your fren is a trouble maker. I'm not saying he should keep quiet, but there are much better ways to handle things than make a fuss and complain to Mindef etc. Lets see who he can complain to when he starts a real job.
From OC point of view, could be injury does not hinder weapons training or doing basic patrol.
From MO's pov, could be better not risk it.
From soldier pov, could be best is go bunk sleep for 2 years. dun do anything.
The thing is, now a days, the younger generations like to ask this ask that, like to challenge the norm. This is in conflict with reginmentation where you obey orders first and question later.
whether it is good or bad. Dunno. But it sure makes the lives of commanders a harder job now a days.