Have you ever thought about all the different drinks you can get at the coffee shop? You can get an espresso, an Americano, a latte, macchiato, frappe, iced coffee, drip coffee, or even coffee-free options. People of all kinds flock to a coffee shop, but request very different things.
The body of Christ is a lot like that. We all belong to the same God, yet we have very different circumstances and backgrounds. I struggle with anxiety, OCD, and doubt. Other Christians may never experience those struggles, but they struggle with anger, pride, porn addiction, etc. We have very different issues, and yet we all meet at the same place- at the foot of the cross.