Having to think about everything all the time would be impractical so people rely on other people to think certain thoughts for them. This happens all the time without us noticing or caring most of the time. For example, reading what an expert has to say about something is more efficient than deriving your own opinion from source materials.
The problem with that is people can be wrong, misinformation can mislead you, disinformation is purposely trying to mislead you, and experts are just people too. You have to be mindful when you are outsourcing your thinking otherwise you won’t be thinking clearly when it matters most.