You act as if we were helpless. You're just seeing the ugly side of "average" people. How quick they are to form blobs around novel information. How lacking in critical thought most people are. It sounds almost absurdly cynical but my experience has made me a cynical person about most other people and their ability to discriminate further than the two categorical blobs of "right" and "left".

Not to mention that focusing on YouTube is a minor thing. Especially when the quality of cognition can be radically changed with diet and habit. Imagine all the people drinking milkshakes from Starbucks, enjoying that sugar and caffeine rush. Remember, it's not a coffee company (profit wise), it's a milkshake company that blends in coffee.

Look at sugar content of their items.

And to add, they're even worse than milkshakes. At least there's fat content which slows insulin resistance.