Narrow is a negative indicator in many angles of life. Broad is spacious, airy and comfortable whereas narrow is small, unventilated and tight.
Narrow mindedness makes people not to mingle with society. They suspect everyone they come across and do not believe others’ suggestions. They are mostly self oriented. They take support of astrology and superstitions for defense.
Narrow bridge and narrow road are also not comfortable for journey and they are risky too. But Nature do not give us everything in wide. A mountain which is big and broad at the base also becomes narrow as we go up! We have to accept such things and make our minds broad to enjoy them.
The only place where narrowing is useful is in science and mathematics. Unless scientists narrow down their findings, they can not reach a result. It is their target. A target should be as narrow as possible for a successful achievement.