REAL WORLD
You are not signing in.Your phone says otherwise.
You are sitting at your desk. You are not signing in anywhere. Your phone displays an approval request. Then another. Then another.
At some point it becomes tempting to approve one just to make the interruptions stop. That reaction is exactly what some attackers are trying to create.
REPEATED PROMPTS
AUTHENTICATOR
Approve sign-in?
AUTHENTICATOR
Approve sign-in?
AUTHENTICATOR
Approve sign-in?