At that time, 1970, most of us took the que sera sera attitude. If called, go, if not, leave it alone. We all knew enough returnees to know that it was nothing but a cluster****, certainly not an issue worth dying for, not in the 70s.
I returned from Nam in 71, and you are right, it was a total cluster**** and not at all worth dying for. I stayed 20 years in the USAF, but even today, I think my year in Nam was a total waste of time.
And therefore, you would excuse anyone who dodged the draft in the 70's?