They get far more traction from making bold statements about a product, tool or procedure than presenting logical, informative information.
Take this stupid brush for example. In no way is this an interesting or special brush, hell it doesn't even come with a handle. Had they made a short, factual video about when and where to use it, then listed it for sale and let it fly, no one would take any notice of it at all. It's just another brush in a market flooded with similar tools. However, go out there and make some silly claims, hawk it around to other "influencers" who post similar "reviews" (by the way, its not a "review" if you are sent something for free, that makes it an "advertisement"), and there you have it, people are talking about what is a fairly boring and pointless product. Bingo, clicks, likes, views, sales................................money. And guess what, this man is being paid to do this, as in paid an income for making up unsupported "facts".