The reason is there are three countries I know of that have national service - Israel, South Korea, and Singapore.
Suffice it to say that the first two nations are always in “war mode”, with South Korea fearing invasion from North Korea.
As for Singapore, it was understood the nation’s populace feared for its safety upon separation from Malaysia in 1965. Hence, its government made it compulsory for all its citizens to undergo national service to prepare for any eventualities.
So my question to our government is...