Just to add some context to the story.
Yu-league was the 2nd best basketball league in the world at the time (with 0 foreign talent). It remained at that level for about 15 years, through 70's and 80's. So this world gold was a product of a longterm program. The Greek, Turkish and Spanish clubs were deficient in overall talent to compete. Even though they had some influx of cash to help them import some American or Euro talent. Russian clubs (red army's CSKA) and Lithuanian Žalgiris (part of USSR at the time) were probably the biggest obstacles fo Yu-clubs to overcome. Along with USSR Nat team.
This longterm Euro dominance was made possible by one Socialistic sport policy. Players can go international after they are 28 years old and have served some sort of army service. Imagine that guys, some HOFers in their primes staying home. The age limit was less rigorous as the years from Tito's death passed. Dražen Petrović went to Real Madrid with I believe 23 or 24 years, for a record sum.
That army service I mentioned usualy became 6 months of preparation for the big international competitions. The coaches could drill every single thing, like a specific lineup (usualy anti-Soviet) or zone defense (for Americans) for months and months. Also, since almost no one went to play for foreign teams, the whole national squad was home, free from club activities. Available at all times. The chemistry was amazing on some teams. They were partialy isolated. On some mountains without much (and chosen) press to bother them. Guys like Divac and Rađa would go together to a local village to buy some cheese and cream from a granny. That sounds like it happened such a long time ago.
So compare a talented generation of full grown men, playing in the 2nd best league, with months of preparation and have been playing for years against 19/20 year olds.
They never stood a chance.