I'd say the pioneers, the people you posted, had good intentions.

Ask a child, with little understanding of the world, how to improve the world and they might conclude a unified society, where everyone works together in harmony while caring about others with compassion in order to end poverty and promote education and happiness for everyone. This was something the hippie generation truly believed and honestly, it sounds like a great idea after I've done a bunch of mushrooms or LSD. In fact that artist sounded at times exactly how I sound in my twenties after I've done a bunch of mushrooms and think I'm the greatest philosopher in the world.

This is why I blamed affluent white people because only someone pampered with so much wealth and a complete lack of adversity in their life, who spent their free time doing psychedelics while pondering the world could come to such a conclusion about how best to solve the world's problems. These were the pioneers of this thought. The hippies. It was the hippies who became professors at university who then taught our children and essentially indoctrinated them toward these values and beliefs.

In any event, to answer your question about why is it done behind closed doors today? Because the wolves in society, not the hippies, caught wind of the idea and figured out how best to use it to their advantage. To go with the hippie theme. The outdoor music festival with a bunch of hippies is awesome, then the normies catch wind of it and the music festival becomes commercialized. All of a sudden the music festival sucks because it's no longer about love and mind expansion, it's about sex, drugs, reputation, power and influence. Another way to put it is that communism sounds great if you completely disregard human nature which is what all these people did and as soon as someone comes in looking to exploit human nature to their advantage, communism fails. That's why communism only works as an ideal and not a reality because it completely disregards human nature, something only a pampered wealthy affluent white hippie would fail to consider.

Globalism is done behind closed doors today because the people who understand human nature and are out exploiting it to their advantage have shown up to the party.