When the brand presents a product on its own social media, they show only what they want to show, what is convenient for them
Even a youtuber or a guitar magazine journalist can provide more info that could eventually interest the final customers
You're right, the brand presents what they want you to see, and tells the YouTube what to say, and then everything is parroted a million times by magazines and blogs who are also paid by the brands and told what to say and when to say it.
I get it, y'all just want content. It's free and entertaining and it makes you feel informed. That's fun. But again, this is just a trade show run by the organization that supports the interests of dealers.
NAMM is an ad supported content mill.