The answer is pretty simple - they give you a reason for you to care.
Quick example:
Project Farm[1] on Youtube does product reviews. Maybe they're not the best reviews - I don't really know. They seem at least alright.
But they're constructed in such a way as to be transparent, objective, and easy to understand.
Which is why the channel has a lot of subscribers.
Now, depending on the person, "a reason for you to care" will be different. But that's part of the reason why there's so many different influencers in each area - different influencers appeal to different people.
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