As rational as we like to think we are, our brain is riddled with ingrained patterns of thought which can lead us to be very irrational. You'd see loads of these on facebook when following an argument in the comments of a post.
No one ever took me seriously. I was either too small, or too weak, or too carefree for others to look at me like I could make a difference. But all of those moments where people defeated me for things that weren't necessarily bad things, those moments made me great.