If you say, "all people in this group is like this", I won't pay attention. Not because I believe you are wrong, but because I'm busy and I don't have time to check.
If you say, "I am in this group, and this is my experience", I'll pay more attention. Not because I think it's true, but because I just love you humans so much!
Point: speak who you are, because everything else is boring busy work.