Well, I’m 6'5". People are less willing to harass me. That advantage is doubled because I’m a male.
I’m white, and practical observation has taught me I’m more likely to be trusted as a witness and less likely to be to interpreted as a threat by police.
And, for better or worse, people who look like me are more willing to listen to me. I’m also educated, so I can explain myself pretty well to a lot of people I come across.
Basically, the way I look and present allows me to occupy spaces during times of conflict that may help others.