Determining why you're friends with someone

Just want to thriw this out there because I'm genuinely curious and I saw a video on tiktok that hasn't left my head. Basically, the video had 2 people speaking on the topic about getting to know yourself as a person better.

In it, they said to ask one of your close friends the following: "Why are you friends with me?" It will aparently lead to some surface level stuff because its difficult to put into tords this feeling of why, but after enough time/prodding, eventually the why comes out.

I've been trying to picture the why for some of my friends, but I genuinely can't break the surface and I'm not sure if theres any other reason.

I'm curious if anyone has asked a friend or someone close this question, and what they learned about both the friendship and themselves.