It's not necessarily about needing someone to tell them what to think. Only very charasmatic people can influence opinions in the way you're suggesting, and YongYea is not what I would call charasmatic. For me, I like to hear what other people's opinions are. It makes you think. It informs you on the way others feel about something. And it helps you to prepare a retort if you disagree.
Even when I vehemently disagree with someone on a more controversial subject, even politics, I will often listen to their point-of-view. If I cover my ears and scream, or only hear what I want to hear, I miss the opportunity to find out I may be wrong about something.
As the saying goes, ignorance is bliss. This is not a personal dig at anyone who doesn't want to watch influencers btw. I'm just trying to explain why I watch some of them. There are those YouTubers I avoid like the plague as well, such as The Quartering, who does nothing but push fear/hate propaganda about extremist boogeymen. YongYea is as tame as a kitten compared to the filth at the bottom of the barrel.