Would it have made a difference if we didn't go???
IMNSHO, yes. Having done what we did, makes the decay of the country under Obunga so much more stark.
JFK, for all his flaws, did give the country a vision. Until Zero came along to dismantle everything, that capability and vision were pretty much still in place.
My biggest beef with him is starting the RVN fiasco and getting over 50k of my brothers killed.
Yes. A great deal of technology you enjoy today came directly from that program. There are literally thousands of offshoots. What I remember most is pride in the United States and frequent news events that were exciting. Nowadays, news is usually bad and centers around the decay of American culture.
I take it that you did not live during those times. Too bad, you really missed something grand.