It is important to understand that to ignore does not mean to run away. Many people, trying to keep peace of mind, run from any negativity, and it turns them into a squirrel, fixated in the wheel of all that they do not like.
Inside man is illuminated by the sun. If this energy is not used for growth and movement, there is negativity and fear. Fear is like a radiator, something that drains excess energy. If fear is turned off but growth is not turned on, the system will burn.
Every feeling is an expenditure of energy. Energy desirable spend on useful creative activities. It is foolish to waste energy on negativity or pleasure, especially since pleasure can be obtained for free in the process of creation.
The harm of fear is that we fear in advance for a very long time. Fear has not yet come, and we have already spent all the energy and exhausted forces. With an effort of will and mind in advance to hope for a positive outcome. If the outcome is negative, the torment will be five minutes. If you suffer in advance, stress can last for days and weeks.