..."Can Die for your country" is not the same as actually "SERVING your county"

IF YOU CAN DIE FOR YOUR COUNTRY, YOU SHOULD BE ABLE TO DRINK:
The saying goes, "If you can die for your country, you should be able to drink."

OK, dying for one country is one thing, but turning 21 does not mean you actually
put your own life are risk. Or for that matter turning 21 does not mean you actually enlisted or even went to war or fought in a combat zone.

By saying, "If you can die for your country, you should be able to drink", you are also saying by the time a preson turns 21, they are EQUAL to soldiers who actually faced death or fought in a combat zone.

Even soldiers who have never faced combat are not thought of as EQUALS to veterans who have been in a combat zone and ACTUALLY put their lives are risk. So why should those who simply turn 21 be EQUAL to soldier who ACTUALLY was on the battlefield?

There is a BIG DIFFERENCE between "CAN DIE for your county" and actual "combat experience". Signing the Selective Service form you get in the mail at around 21 year of age IS NOT "combat experience", "enlistment", "service" whatsoever and DEFINATELY not putting one's life on the line.
If so, should anyone who turns 21 and signs the Selective Service form and mails it in, get Veterans Benefits since they are EQUAL to those Veterans who have served in actually combat?