It is easy to be a realist and dismiss everything by rationalising the situation.
What takes real inner strength is being optimistic and a dreamer. Always hoping for the good but being mentally prepared for the worst is true humanism.
You need both. You need to be a realist at heart for protecting yourself and an optimist and dreamer in your mind to make sure your sense of direction is beautifully planned.
So be both and expect others to be so as well.