That's just fiction. There will always be people who aren't really interested in the facts and just want to be told what they want to hear. You can make a great living out of shilling products to fanboys on Youtube. Not just in the PC hardware space either. The same goes for music, films, TV, video games... Youtube is full of absolute garbage channels with tens of thousands, hundreds of thousands and occasionally millions of subscribers that do little more than rabidly defend the compan(y/ies) that send(s) them a ton of free stuff. You're putting far, far too much faith in the average person who watches Youtube if you think that they care whether it's fully accurate or not. Plenty of Youtubers have been caught running outright scams targeted at their viewers and come out of it practically unscathed, because their loyal fanbase either calls it fake news or says they deserve another chance or they'll stand by them no matter what.no they aren't, if they gave bad advice and shilled every time and the product wasnt actually good, then would loose all their viewers.
The vast majority of the site is a cesspool full of people just looking to make as much money as possible from their channel. The actual decent, passionate people who are on the level and produce great content are the minority.