Why are people more likely to see ‘who is talking?’ Rather than ‘what is he talking about?

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’ By others is because .... [But before that let's suppose with: The principal met his student who was waiting for the pick-up and said that the students would be vaccinated cov19 next week] So, that tendency could be because: Looking at the importance of sources of information In order to be able to convince information that it is true and not fake news. If only the one who said the student news would be vaccinated soon would be the father of the school cleaner. Maybe the information will be doubted by the students (not intending to demean the father of the school cleaner) Still looking down on people who "look" Low Yes, this happens often, including me. For example, from the case above, the one who tells the student is the principal, the student will immediately believe it. Meanwhile, if the one who tells is the father of the school cleaner, it will be difficult to believe because the mindset that thinks that the father of the school cleaner is low, doesn't know apa-apa, the source of the information is not clear. Or in other cases, I also often experience, when I tell a fact, and my friends don't believe what I say. But when my teacher delivered it, they immediately believed it. Example : I convey that ‘mosquitoes that bite humans are female mosquitoes, while male mosquitoes do not’ My friends just take me for granted, woated, etc. But when my teacher also conveyed the same thing as what I had said, my friends just believed it. [Hehehe, this is just from my point of view who is not insightful enough, just expressing opinions, sorry if you act like patronizing, or something like that] Thank you so much for reading!