In BG3 we have a voice explaining everything instead. Like "Gnoll is like this and that". As it generalizes about how they're just evil and bloodthirsty instead of going into any meangful depth.
It was "Gnolls sees whole world as a meal" ... i just want to remind you that this sentence is told by Narator only if you sucess on your passive Intelligence (arcana i believe?) diceroll check ... so, there is no Narator telling you what Gnolls are ... actualy there is Narator telling you what your character remembered.

Also ... i believe (but could be wrong tho) that massacre all around the Gnolls should pretty much give you image of "how bloodthirsty" they actualy are.

WHAT authoratory? WHY is the player in control of the current situation? Is the tadpole forcing its way into someones mind to read it or does the person allow it subconsciously? These are events the narrator could go into depth about.
I disagree ...
Those are questions that we (or our characters if you wish) are suppose to ask themselves ... they are not ment to be answered (at least not yet)