I don't think it's a placebo effect. Buffers do a tangible thing. They set input impedance and increase the gain in a signal. Turning on a low or high pass filter does something tangible. Depending on how they're used/designed they'll cut frequencies, which gives the impression of emphasizing others. A charge pump changes the voltage in the circuit. I think this one gets bumped up to 15v (I could be wrong about that). Usually this gives the impression of headroom. If you've ever tried something like the Hudson broadcast, the charge pump in it is switchable from 9v to 27v - it's a huge change.
I probably should have mentioned that your original post calls this circuit magical and mysterious and I was partially responding to that. It's not. It looks over-engineered and I'm dubious that it does something that a different buffer or even an eq pedal couldn't do, but that's my own take. I don't think there's anything wrong with buying one. I have a ton of pedals. 80% of which are extremely redundant.
A huge proportion of the world was still under direct colonial control after WWII. Like most of Africa, swathes of Asia. Pick a country on a map and look at the date it was granted independence. I can almost guarantee that it will be later than you expected. Post-WWII is not a low point for colonialism.
I would further argue that many of the countries that were granted independence only received the ability to install administrators who were of an indigenous ethnic group. Trade agreements and terms dictated by loans from groups like the international monetary fund still directed a large proportion of domestic and foreign policy. So even though the government of a country may have had a constitution and veneer of democracy it was still operating at the behest of foreign interests (ex. Shell in Nigeria, Firestone in Liberia, Exxonmobil in Indonesia, etc.), who propped up puppet leaders that allowed them to continue to extract resources under the same or similar agreements they enjoyed under colonialism.