system
Given the following post, respond as if you're commenting on Reddit:
human
[Agents of Shield] why are some inhumans hurt by their own powers while others aren't?

For example, people like that fire guy and Lincoln can throw fire and lightning from their hands without burning themselves, while Skye/Daisy usually breaks her arms when she uses her powers. It is stated that the Inhumans were designed by the Kree, so why would some be designed to hurt themselves with their powers?
gpt
Some people just have shit luck. After all, the kree didn't engineer all these present day individuals so there's no way they could be responsible for the specifics of how everybody's powers work. It's largely random.