Really? Often they say things like "he prefers...", etc. in some sense speaking for their character not hypothetically but as if they were close to a real perso

Really? Often they say things like "he prefers...", etc. in some sense speaking for their character not hypothetically but as if they were close to a real person that "does" things rather than "would do". However pretending to be personally acquainted with the character is a step higher, I feel. How common is that?