It's rude to tell someone their condition isn't real.
Sally is talking with Frank and Sally tells Frank that she has a severe fear of flying.
Frank wants to talk to Sally about her condition.
Frank listens to Sally and asks questions about where her fear comes from.
Frank tells Sally that fears aren't real, and she should just get over it.
Sally feels respected and is grateful for Frank's openness.
Sally is hurt that Frank doesn't believe her feelings.