If educating people worked there wouldn’t be any obese people, or drunkards, or smokers, druggies, gamblers, people addicted to doomscrolling or video games or ragebait "news" or…

Education is as useful as preaching abstinence at horny teenagers instead of providing access to contraceptives

What if educating people takes decades and lies can be prompted in a few minutes?

Intuitively yes, but it's possible that this is one of our biases speaking

From my memory (might be mistaken) there have been attempts to somewhat study this via polls etc, and determined that coverage via propaganda (specifically Fox News) is less helpful then randomly guessing what actually happened...

But ymmv, social studies are always hard to trust, because it's borderline impossible to prove cause and effect

That depends on what "education" entails. If it's one source only chances of it being propaganda is high.

For real... the species is not going to last long if a subset of it gets to control the information flow of the other part... literally unsustainable