If only devices were never created.

If only I didn't have the genes of my death-defying ancestor.

If only I didn't let my friends press the "play" button on that screen.

If only I was strong enough to protect my friends.

If only I could have saved one more person in my gang.

If only I was the sacrifice instead of my brother.

If only I had done all these things, then my brother wouldn't be dead.